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School: Kentucky
Course: Principles Of Statistics
Sensitivity and Specificity Part 2 CONSEQUENCES OF SENSITIVITY AND SPECIFICITY Review: Sensitivity and Specificity There are 2 ways in which a dichotomous test can be correct. They are sensitivity and specificity Sensitivity is the test ability to corre
School: Kentucky
4/18/2014 STA291 Statistical Methods Lecture 27 Inference for Regression Does the cost of a movie depend on its length? 31.38695 0.7144001 Now we want to know, how useful is this model? The Population and the Sample The movie budget sample is based on 120
School: Kentucky
8/29/2013 STA291 Statistical Methods Pre-material Review Common Language o Population o Sample o Sampling Frame o Census o Parameter o Statistic Example The economic recession of 2008 led many consumers to reduce their spending on nonessential items. A Ga
School: Kentucky
4/24/2014 STA291 Statistical Methods Lecture 31 Exam 3 o Wednesday, May 7th from 6PM 8PM. o Location: Whitehall Classroom Building room 106 (CB 106). o Make sure you bring an ID and a calculator to the exam. Analyzing a Design in One Factor The One-Way A
School: Kentucky
4/17/2014 STA291 Statistical Methods Lecture 26 Chi-Square Test of Independence The table below shows the importance of personal appearance for several age groups. Are Age and Appearance independent, or is there a relationship? 2 Chi-Square Test of Indepe
School: Kentucky
4/18/2014 STA291 Statistical Methods Lecture 27 Inference for Regression Does the cost of a movie depend on its length? 31.38695 0.7144001 Now we want to know, how useful is this model? The Population and the Sample The movie budget sample is based on 120
School: Kentucky
8/29/2013 STA291 Statistical Methods Pre-material Review Common Language o Population o Sample o Sampling Frame o Census o Parameter o Statistic Example The economic recession of 2008 led many consumers to reduce their spending on nonessential items. A Ga
School: Kentucky
4/24/2014 STA291 Statistical Methods Lecture 31 Exam 3 o Wednesday, May 7th from 6PM 8PM. o Location: Whitehall Classroom Building room 106 (CB 106). o Make sure you bring an ID and a calculator to the exam. Analyzing a Design in One Factor The One-Way A
School: Kentucky
4/17/2014 STA291 Statistical Methods Lecture 26 Chi-Square Test of Independence The table below shows the importance of personal appearance for several age groups. Are Age and Appearance independent, or is there a relationship? 2 Chi-Square Test of Indepe
School: Kentucky
4/10/2014 STA291 Statistical Methods Lecture 25 Goodness-of-Fit Tests Given the following 1) Counts of items in each of several categories 2) A model that predicts the distribution of the relative frequencies this question naturally arises: Does the actua
School: Kentucky
4/10/2014 STA291 Statistical Methods Lecture 24 Inference about difference of population proportions One case: independent, large samples or completely randomized design with large n in either instance, variable of interest is qualitative (or categorical
School: Kentucky
Course: Principles Of Statistics
Sensitivity and Specificity Part 2 CONSEQUENCES OF SENSITIVITY AND SPECIFICITY Review: Sensitivity and Specificity There are 2 ways in which a dichotomous test can be correct. They are sensitivity and specificity Sensitivity is the test ability to corre
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 2 Common Language o Population o Sample o Sampling Frame o Census versus census o Parameter o Statistic Example University Health Services at UK conducts a survey about alcohol abuse among students. Two-hundred
School: Kentucky
Course: Principles Of Statistics
Module 2 Exam B Statistic plus or minus MOE: Confidence interval Designed to be biased: Push Poll n individuals chosen from the population in such a way that every individual has the same chance of being selected: simple random sample numerical way of ack
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 4 (Practice) Real quiz 4: Thursday, April 19 1. Erectile dysfunction (the persistent inability to achieve or maintain an erection sucient for satisfactory sexual performance) is estimated to aect up to 30 million Amer
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 3 (Practice) Real quiz 3: Thursday, March 29 1. According to the Child Health and Development Study, the average pregnancy length (for women who do not suer a miscarriage) is 279 days, with a standard deviation of 16
School: Kentucky
Course: General Statistics
Name: Section: Homework 1 Solutions Chapter 1 Due: 5/11 1. An opinion poll contacts 1000 randomly selected adults from the U.S. and asks them, Please tell if you have bought a lottery ticket in the last 12 months. a. What is the population in this observa
School: Kentucky
STA200 Lab9 Name: Section: TheLawofAveragedescribesthebehaviorofexperimentalresultsasthenumberof independenttrialsincreases(e.g.,asweaddmoreflipsofacoinormorespinsofaroulette wheel). TheLawofAverages:Averagesofproportionsarelikelytobemorestablewhentherea
School: Kentucky
Lab8:InClass 1. Thefollowingstatementscontainamistake.Explainwhatiswrong. a. Wefoundacorrelationofr=1.09betweentheheightandweightofAmerican adults. b. Thecorrelationbetweenthegenderofworkersandtheirincomeisr=0.78. c. GotothefollowingWebsite: http:/bcs.whf
School: Kentucky
Lab7:InClass Openmywebsitehttp:/web.as.uky.edu/statistics/us ers/dcluek2/ ClickonthelinkforthisclassthenclickonApplets intheupperleft Clickonthethirdimage(itshouldlooklikeanormalc curve).Thiswebpagehasanappletthat s calculatesnormalprobabilities. Ontheapp
School: Kentucky
Lab6:InClass Governmentregulationsrequireautomakerstogivethecityandhighwaygasmileageforeach modelofcar.Calculatethefivenumbersummaryforthefollowing: a) Thefollowingdatasetgivesthehighwaymileages(milespergallon)forsedans. 1516161822222323242424242425252626
School: Kentucky
Lab5:InClass 1. Sketchlinegraphsofaseriesofobservationsovertimehavingeachofthesecharacteristics. Markyourtimeaxisinyears. a. Astrongdownwardtrend,butnoseasonalvariation. b. Seasonalvariationeachyear,butnocleartrend. c. Astrongdownwardtrendwithyearlyseason
School: Kentucky
Lab4:InClass 1. Doesanewmedicinereducethepainfromaheadache?Aresearchergathered100college studentscurrentlysufferingfromheadachesandgaveallofthemthenewmedicine.The researcherwassurprisedtolearnthat85%ofthestudentshadlesspain. a. Explainwhyweshouldnotputtoo
School: Kentucky
Course: Nonparametric Statistics
Nonparametric Statistics University of Kentucky STA 621, Fall 2012 Credit: 3.0 Lecture: 12:30 p.m - 1:45 p.m., Tuesdays and Thursdays Room 335, Multidisciplinary Sciences Building (MDS 335) Instructor: Patrick Breheny, Ph.D. Oce: Room 205D, Multidisciplin
School: Kentucky
Course: Nonparametric Statistics
Bayesian Modeling in Biostatistics University of Kentucky BST 701, Spring 2013 Credit: 3.0 Lecture: 3:30 p.m - 4:45 p.m., Tuesdays & Thursdays Room 206, Multidisciplinary Sciences Building (MDS 206) Instructor: Patrick Breheny, Ph.D. Oce: MDS 205D Phone:
School: Kentucky
Course: Nonparametric Statistics
Advanced Regression University of Kentucky BST 760, Spring 2011 Credit: 3.0 Lecture: Lab: 3:30 a.m - 5:20 p.m., Thursdays Room 222, Multidisciplinary Science Building (MDS 222) 3:30 a.m - 5:20 p.m., Tuesdays Room 207, College of Public Health Building (CP
School: Kentucky
STA 291-010 STATISTICAL METHODS SUMMER 2010 (Tentative, Tentative, Tentative, ) INSTRUCTOR Dustin Lueker Office: 859D POT Email: dustin.lueker@uky.edu Website: http:/web.as.uky.edu/statistics/users/dcluek2/ Office Hours: By Appointment TEXT Business Stati
School: Kentucky
STA 200-010 STATISTICS A FORCE ON HUMAN JUDGMENT SUMMER I 2011 (Tentative, Tentative, Tentative, ) INSTRUCTOR Dustin Lueker Office: 859D POT Email: dustin.lueker@uky.edu Website: http:/web.as.uky.edu/statistics/users/dcluek2/ Office Hours: By Appointment
School: Kentucky
Course: Principles Of Statistics
Sensitivity and Specificity Part 2 CONSEQUENCES OF SENSITIVITY AND SPECIFICITY Review: Sensitivity and Specificity There are 2 ways in which a dichotomous test can be correct. They are sensitivity and specificity Sensitivity is the test ability to corre
School: Kentucky
4/18/2014 STA291 Statistical Methods Lecture 27 Inference for Regression Does the cost of a movie depend on its length? 31.38695 0.7144001 Now we want to know, how useful is this model? The Population and the Sample The movie budget sample is based on 120
School: Kentucky
8/29/2013 STA291 Statistical Methods Pre-material Review Common Language o Population o Sample o Sampling Frame o Census o Parameter o Statistic Example The economic recession of 2008 led many consumers to reduce their spending on nonessential items. A Ga
School: Kentucky
4/24/2014 STA291 Statistical Methods Lecture 31 Exam 3 o Wednesday, May 7th from 6PM 8PM. o Location: Whitehall Classroom Building room 106 (CB 106). o Make sure you bring an ID and a calculator to the exam. Analyzing a Design in One Factor The One-Way A
School: Kentucky
4/17/2014 STA291 Statistical Methods Lecture 26 Chi-Square Test of Independence The table below shows the importance of personal appearance for several age groups. Are Age and Appearance independent, or is there a relationship? 2 Chi-Square Test of Indepe
School: Kentucky
4/10/2014 STA291 Statistical Methods Lecture 25 Goodness-of-Fit Tests Given the following 1) Counts of items in each of several categories 2) A model that predicts the distribution of the relative frequencies this question naturally arises: Does the actua
School: Kentucky
4/10/2014 STA291 Statistical Methods Lecture 24 Inference about difference of population proportions One case: independent, large samples or completely randomized design with large n in either instance, variable of interest is qualitative (or categorical
School: Kentucky
4/1/2014 STA291 Statistical Methods Lecture 23 Difference of means, redux Default case: assume no natural connection between individual observations in the two datasets. For example: compare average ROI for two investment firms May be difficult (impossibl
School: Kentucky
2/25/2014 STA291 Statistical Methods Lecture 18 A natural starting point: o Thanks o We to the CLT know is approximately standard normal. o What about ? 2 Estimation of a Population Mean o The sample mean is an unbiased and efficient point estimator of t
School: Kentucky
3/27/2014 STA291 Statistical Methods Lecture 22 Exam 2 o Tuesday, April 1st from 5PM 7PM. Building room 139 (for sections 001-006). o Alternate exam: Tuesday, April 1st from 7PM 9PM. Location TBA. If you took the alternate exam last time, please verify wi
School: Kentucky
3/13/2014 STA291 Statistical Methods Lecture 21 Exam 2 o Tuesday, April 1st from 5PM 7PM. Building room 139 (for sections 001-006). o Alternate exam: Tuesday, April 1st from 7PM 9PM. Location TBA. If you took the alternate exam last time, please verify wi
School: Kentucky
2/13/2014 STA291 Statistical Methods Lecture 14 Exam 1 o Tuesday, February 18th from 5PM 7PM. o Location: Chemistry-Physics Building room 139 (for sections 001-006). o Alternate exam: Tuesday, February 18th from 7PM 9PM. Location TBA. I need to see a copy
School: Kentucky
3/7/2014 STA291 Statistical Methods Lecture 20 Where do we start? We start with the null hypothesis, H0 About the proportion of successful sales in a region of the country where a new rep works H0: p = 0.42 About the proportion of voters who are going to
School: Kentucky
2/27/2014 STA291 Statistical Methods Lecture 19 Logic of a Hypothesis Test Your friend is dreaming of joining UKs basketball team and claims he is a 90% free throw shooter. o You say, Okay, prove it! and let him shoot 20 free throws. He makes 8 of them. o
School: Kentucky
2/20/2014 STA291 Statistical Methods Lecture 15 Chapter 10: Sampling Distributions X Population with mean and standard deviation X X X X X X X X If you repeatedly take random samples and calculate the sample mean each time, the distribution of the sampl
School: Kentucky
2/6/2014 STA291 Statistical Methods Lecture 13 Last time Notions of: o Random variable, its o expected value, o variance, and o standard deviation 2 Bernoulli o o o o o Distribution Suppose we have a single random experiment X with two outcomes: success
School: Kentucky
1/31/2014 STA291 Statistical Methods Lecture 12 Random Variables A variable X is a random variable (r.v.) if the value that X assumes at the conclusion of an experiment cannot be predicted with certainty in advance. o There are two types of random variabl
School: Kentucky
1/24/2014 STA291 Statistical Methods Lecture 10 Measuring something over time o Like o a companys stock value: It kind of just sits there, making your eyes glaze over. And even though were measuring one variable (of interest), we need to look at two varia
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 8 Numerical Summary of Quantitative Data o Were up to the V of CVDO(T): VARIABILITY Range o Range: Difference between the largest and smallest observations o Very much affected by outliers (one misreported obser
School: Kentucky
1/30/2014 STA291 Statistical Methods Lecture 11 LINEar Association or measures closeness of data to the best line. What line is that? And best in what terms of what? o In terms of least squared error: Best line: least-squares, or regression line Observed
School: Kentucky
1/23/2014 STA291 Statistical Methods Lecture 9 Box Plot (AKA Box-and-Whiskers Plot) A box plot is basically a graphical version of the five-number summary (unless there are outliers) o It consists of a box that contains the central 50% of the distribution
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 3 Why do we (usually) provide graphs? Recall: Categorical or Qualitative Data o Nominal variables have a scale of unordered categories o Nominal examples : gender, nationality, hair color, state of residence o F
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 7 Numerical Summary of Quantitative Data o Given a sample of quantitative data, we started by summarizing using a frequency distribution oWe then looked at the graph & considered oC oV oD oO o(T) Mean (Average)
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 5 Disjoint Sets Let A and B denote two events. Disjoint (mutually exclusive) events: A and B are said to be disjoint if there are no outcomes common to both A and B. The notation for this is written as A B Note
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 4 Probability o Abstract but necessary because this is the mathematical theory underlying all statistical inference Probability Population Sample (Inferential) Statistics o Fundamental concepts that are very imp
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 6 Recall: Quantitative Data o Units tell how each variable has been measured o Interval and ratio o Discrete and Continuous Summary of Quantitative Data o In contrast to what we could do with a qualitative varia
School: Kentucky
2/14/2014 STA291 Statistical Methods Exam 1 Review Exam 1 o Tuesday, February 18th from 5PM 7PM. o Location: Chemistry-Physics Building room 139 (for sections 001-006). o Alternate exam: Tuesday, February 18th from 7PM 9PM. Location TBA. I need to see a c
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 1 Why Statistics? What is Statistics? 1 5/2/2013 What are (?) data? cases: about whom or what we record some characteristics. variables: the characteristics recorded about each individual or case are called Type
School: Kentucky
Course: Principles Of Statistics
Sampling Goal of sampling is to make inferences about a population from what we know about our sample data something we can't do perfectly, but can do scientifically Scientifically? Basically we want to be able to estimate things in the population using o
School: Kentucky
Course: Principles Of Statistics
Module 2 Exam B Statistic plus or minus MOE: Confidence interval Designed to be biased: Push Poll n individuals chosen from the population in such a way that every individual has the same chance of being selected: simple random sample numerical way of ack
School: Kentucky
Course: Principles Of Statistics
1. 2. 3. 4. 5. Laura Ann Kidd Louisville, KY Nursing I did an internship in D.C. for tax litigation and hated it. That's me on a segway tour. I was briefly on the Bowling team at Sacred Heart Academy, my alma mater.
School: Kentucky
Course: Principles Of Statistics
STATS TEST Increasing z, decreasing n depends how much Higher confidence higher z star Any question with confidence interval, write out interval? What happens when p^, n, or z gets bigger or smaller? P^ = sample proportion Divide a small number, small sam
School: Kentucky
Course: Principles Of Statistics
Sensitivity and Specificity Simply hypothesis testing Start by discussion of simple yes/ no test; One involving metrics, field sobriety, pregnancy tests Bring structure to introduce language of S/S Connecting language of specificity and sensitivity to lan
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 4 (Practice) Real quiz 4: Thursday, April 19 1. Erectile dysfunction (the persistent inability to achieve or maintain an erection sucient for satisfactory sexual performance) is estimated to aect up to 30 million Amer
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 3 (Practice) Real quiz 3: Thursday, March 29 1. According to the Child Health and Development Study, the average pregnancy length (for women who do not suer a miscarriage) is 279 days, with a standard deviation of 16
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 2 (Practice) Real quiz 2: Thursday, February 23 1. A dental cary is a an invasion of the tooth by microorganisms. Caries develop gradually over time, starting out minor but eventually developing into cavities. I will
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Final (Practice) Real nal: Thursday, April 26, 3:30-5:30 1. (17 points) A study of ozone exposure and asthma conducted at the University of Southern California states that 3535 children with no history of asthma were recru
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 1 (Practice) Real quiz 1: Thursday, February 2 1. (17 points) A study published in the British Medical Journal compared the eectiveness of dierent treatments for the treatment of kidney stones. Investigators randomly
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 2 Common Language o Population o Sample o Sampling Frame o Census versus census o Parameter o Statistic Example University Health Services at UK conducts a survey about alcohol abuse among students. Two-hundred
School: Kentucky
Course: General Statistics
Name: Section: Homework 1 Solutions Chapter 1 Due: 5/11 1. An opinion poll contacts 1000 randomly selected adults from the U.S. and asks them, Please tell if you have bought a lottery ticket in the last 12 months. a. What is the population in this observa
School: Kentucky
Course: General Statistics
Name: Section: Homework 2 Solutions Chapter 2 Due: 5/12 1. Exercise 2.9 from book (page 31). Call-in polls (especially those that cost to call in), and voluntary response polls in general, tend to attract responses from those who have strong opinions on t
School: Kentucky
Course: General Statistics
Name: Section: Homework 3 Solutions Chapter 3 Due: 5/12 1. A professor at a university with 30,000 students plans a survey. He randomly selected 200 students to interview. In the survey, 40% of the 200 students interviewed say they drink soda on a daily b
School: Kentucky
Course: General Statistics
Name: Section: Homework 4 Solutions Chapter 4 Due: 5/13 1. Exercise 4.4 from book (page 72). Explain your answer for all three parts. a. Nonsampling error: this is a response error, and it could happen even if we took a census. b. Nonsampling error: this
School: Kentucky
Course: General Statistics
Name: Section: Homework 5 Solutions Chapter 5 Due: 5/16 1. Although the law doesnt require it, we decide to subject Dr. Moores Indiana Extract to a clinical trial. We hope to show that the extract reduces pain from arthritis. One-hundred patients sufferin
School: Kentucky
Course: General Statistics
Name: Section: Solutions for Suggested Problems from Chapter 6 1. Exercise 6.4 from book (page 115). The ratings were not double-blind because the researcher knew which subjects received the capsaicin and which received the placebo. If the researcher beli
School: Kentucky
Course: General Statistics
Name: Section: Homework 6 Solutions Chapter 10 Due: 5/20 1. A survey of 1000 college freshmen in 2001 asked what field they planned to study. The results: 126 said arts and humanities, 166 said business, 101 said education, 186 said engineering and scienc
School: Kentucky
Course: General Statistics
Name: Section: Homework 7 Solutions Chapter 11 Due: 5/20 1. The following table gives the highway miles per gallon (MPG) for 23 cars. Model Acura 3.5RL Bentley Arnage Cadillac CTS Chevy Malibu Dodge Stratus Honda Accord Hyundai Sonata Infiniti I35 MPG 24
School: Kentucky
4/18/2014 STA291 Statistical Methods Lecture 27 Inference for Regression Does the cost of a movie depend on its length? 31.38695 0.7144001 Now we want to know, how useful is this model? The Population and the Sample The movie budget sample is based on 120
School: Kentucky
8/29/2013 STA291 Statistical Methods Pre-material Review Common Language o Population o Sample o Sampling Frame o Census o Parameter o Statistic Example The economic recession of 2008 led many consumers to reduce their spending on nonessential items. A Ga
School: Kentucky
4/24/2014 STA291 Statistical Methods Lecture 31 Exam 3 o Wednesday, May 7th from 6PM 8PM. o Location: Whitehall Classroom Building room 106 (CB 106). o Make sure you bring an ID and a calculator to the exam. Analyzing a Design in One Factor The One-Way A
School: Kentucky
4/17/2014 STA291 Statistical Methods Lecture 26 Chi-Square Test of Independence The table below shows the importance of personal appearance for several age groups. Are Age and Appearance independent, or is there a relationship? 2 Chi-Square Test of Indepe
School: Kentucky
4/10/2014 STA291 Statistical Methods Lecture 25 Goodness-of-Fit Tests Given the following 1) Counts of items in each of several categories 2) A model that predicts the distribution of the relative frequencies this question naturally arises: Does the actua
School: Kentucky
4/10/2014 STA291 Statistical Methods Lecture 24 Inference about difference of population proportions One case: independent, large samples or completely randomized design with large n in either instance, variable of interest is qualitative (or categorical
School: Kentucky
4/1/2014 STA291 Statistical Methods Lecture 23 Difference of means, redux Default case: assume no natural connection between individual observations in the two datasets. For example: compare average ROI for two investment firms May be difficult (impossibl
School: Kentucky
2/25/2014 STA291 Statistical Methods Lecture 18 A natural starting point: o Thanks o We to the CLT know is approximately standard normal. o What about ? 2 Estimation of a Population Mean o The sample mean is an unbiased and efficient point estimator of t
School: Kentucky
3/27/2014 STA291 Statistical Methods Lecture 22 Exam 2 o Tuesday, April 1st from 5PM 7PM. Building room 139 (for sections 001-006). o Alternate exam: Tuesday, April 1st from 7PM 9PM. Location TBA. If you took the alternate exam last time, please verify wi
School: Kentucky
3/13/2014 STA291 Statistical Methods Lecture 21 Exam 2 o Tuesday, April 1st from 5PM 7PM. Building room 139 (for sections 001-006). o Alternate exam: Tuesday, April 1st from 7PM 9PM. Location TBA. If you took the alternate exam last time, please verify wi
School: Kentucky
2/13/2014 STA291 Statistical Methods Lecture 14 Exam 1 o Tuesday, February 18th from 5PM 7PM. o Location: Chemistry-Physics Building room 139 (for sections 001-006). o Alternate exam: Tuesday, February 18th from 7PM 9PM. Location TBA. I need to see a copy
School: Kentucky
3/7/2014 STA291 Statistical Methods Lecture 20 Where do we start? We start with the null hypothesis, H0 About the proportion of successful sales in a region of the country where a new rep works H0: p = 0.42 About the proportion of voters who are going to
School: Kentucky
2/27/2014 STA291 Statistical Methods Lecture 19 Logic of a Hypothesis Test Your friend is dreaming of joining UKs basketball team and claims he is a 90% free throw shooter. o You say, Okay, prove it! and let him shoot 20 free throws. He makes 8 of them. o
School: Kentucky
2/20/2014 STA291 Statistical Methods Lecture 15 Chapter 10: Sampling Distributions X Population with mean and standard deviation X X X X X X X X If you repeatedly take random samples and calculate the sample mean each time, the distribution of the sampl
School: Kentucky
2/6/2014 STA291 Statistical Methods Lecture 13 Last time Notions of: o Random variable, its o expected value, o variance, and o standard deviation 2 Bernoulli o o o o o Distribution Suppose we have a single random experiment X with two outcomes: success
School: Kentucky
1/31/2014 STA291 Statistical Methods Lecture 12 Random Variables A variable X is a random variable (r.v.) if the value that X assumes at the conclusion of an experiment cannot be predicted with certainty in advance. o There are two types of random variabl
School: Kentucky
1/24/2014 STA291 Statistical Methods Lecture 10 Measuring something over time o Like o a companys stock value: It kind of just sits there, making your eyes glaze over. And even though were measuring one variable (of interest), we need to look at two varia
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 8 Numerical Summary of Quantitative Data o Were up to the V of CVDO(T): VARIABILITY Range o Range: Difference between the largest and smallest observations o Very much affected by outliers (one misreported obser
School: Kentucky
1/30/2014 STA291 Statistical Methods Lecture 11 LINEar Association or measures closeness of data to the best line. What line is that? And best in what terms of what? o In terms of least squared error: Best line: least-squares, or regression line Observed
School: Kentucky
1/23/2014 STA291 Statistical Methods Lecture 9 Box Plot (AKA Box-and-Whiskers Plot) A box plot is basically a graphical version of the five-number summary (unless there are outliers) o It consists of a box that contains the central 50% of the distribution
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 3 Why do we (usually) provide graphs? Recall: Categorical or Qualitative Data o Nominal variables have a scale of unordered categories o Nominal examples : gender, nationality, hair color, state of residence o F
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 7 Numerical Summary of Quantitative Data o Given a sample of quantitative data, we started by summarizing using a frequency distribution oWe then looked at the graph & considered oC oV oD oO o(T) Mean (Average)
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 5 Disjoint Sets Let A and B denote two events. Disjoint (mutually exclusive) events: A and B are said to be disjoint if there are no outcomes common to both A and B. The notation for this is written as A B Note
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 4 Probability o Abstract but necessary because this is the mathematical theory underlying all statistical inference Probability Population Sample (Inferential) Statistics o Fundamental concepts that are very imp
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 6 Recall: Quantitative Data o Units tell how each variable has been measured o Interval and ratio o Discrete and Continuous Summary of Quantitative Data o In contrast to what we could do with a qualitative varia
School: Kentucky
2/14/2014 STA291 Statistical Methods Exam 1 Review Exam 1 o Tuesday, February 18th from 5PM 7PM. o Location: Chemistry-Physics Building room 139 (for sections 001-006). o Alternate exam: Tuesday, February 18th from 7PM 9PM. Location TBA. I need to see a c
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 1 Why Statistics? What is Statistics? 1 5/2/2013 What are (?) data? cases: about whom or what we record some characteristics. variables: the characteristics recorded about each individual or case are called Type
School: Kentucky
Course: Principles Of Statistics
Sensitivity and Specificity Part 2 CONSEQUENCES OF SENSITIVITY AND SPECIFICITY Review: Sensitivity and Specificity There are 2 ways in which a dichotomous test can be correct. They are sensitivity and specificity Sensitivity is the test ability to corre
School: Kentucky
5/2/2013 STA291 Statistical Methods Lecture 2 Common Language o Population o Sample o Sampling Frame o Census versus census o Parameter o Statistic Example University Health Services at UK conducts a survey about alcohol abuse among students. Two-hundred
School: Kentucky
STA291 Summer2010 Lecture22 DustinLueker ComparingDependentSamples Thesamplemeanofthedifferencescoresisan estimatorforthedifferencebetweenthe populationmeans xD = n Di i =1 n D1 + D2 + + Dn = n Wecannowuseexactlythesamemethodsasfor onesample ReplaceXibyDi
School: Kentucky
STA291 Summer2010 Lecture19 DustinLueker Example A95%confidenceintervalforis(96,110). Whichofthefollowingstatementsabout significancetestsforthesamedataistrue? 1. 2. WhentestingH1:100,pvalue>.05 WhentestingH1:100,pvalue<.05 STA291Summer 2 TestStatistic Te
School: Kentucky
STA291 Summer2010 Lecture18 DustinLueker Example ThepvaluefortestingH1:100isp=.001.This indicatesthat 1. 2. 3. 4. Thereisstrongevidencethat=100 Thereisstrongevidencethat100 Thereisstrongevidencethat>100 Thereisstrongevidencethat<100 STA291Summer 2 Example
School: Kentucky
STA291 Summer2010 Lecture17 DustinLueker SignificanceTest Awayofstatisticallytestingahypothesisby comparingthedatatovaluespredictedbythe hypothesis Datathatfallfarfromthepredictedvaluesprovide evidenceagainstthehypothesis STA291Summer 2 LogicalProcedure S
School: Kentucky
STA291 Summer2010 Lecture16 DustinLueker Example Charlieclaimsthattheaveragecommuteofhis coworkersis15miles.Stubelievesitisgreater thanthatsohedecidestoasksomeofhis coworkerswhattheircommuteis.Heasks36of themandfindsthattheiraveragecommuteis 16.88mileswit
School: Kentucky
STA291 Summer2010 Lecture15 DustinLueker FactsaboutConfidence Intervals Thewidthofaconfidenceinterval Increasesastheconfidencelevelincreases Increasesastheerrorprobabilitydecreases Increasesasthestandarderrorincreases Increasesasthesamplesizendecreases ST
School: Kentucky
STA291 Summer2010 Lecture14 DustinLueker ConfidenceIntervals x Z / 2 s n Thisintervalwillcontainwitha100(1)% confidence Ifweareestimating,thenwhyitisunreasonableforus toknow? Thuswereplacebys(samplestandarddeviation) Thisformulaisusedforalargesamplesize
School: Kentucky
STA291 Summer2010 Lecture13 DustinLueker StatisticalInference: Estimation Inferentialstatisticalmethodsprovidepredictions aboutcharacteristicsofapopulation,basedon informationinasamplefromthatpopulation Quantitativevariables Usuallyestimatethepopulation
School: Kentucky
STA291 Summer2010 Lecture12 DustinLueker CentralLimitTheorem Forrandomsampling,asthesamplesizen grows,thesamplingdistributionofthesample x mean,approachesanormaldistribution Amazing:Thisisthecaseevenifthepopulation distributionisdiscreteorhighlyskewed Ce
School: Kentucky
STA291 Summer2010 Lecture11 DustinLueker ReduceSamplingVariability Thelargerthesamplesize,thesmallerthe samplingvariability Increasingthesamplesizeto25 10samples ofsizen=25 100samples ofsizen=25 STA291Summer 1000samples ofsizen=25 2 SamplingDistribution
School: Kentucky
STA291 Summer2010 Lecture10 DustinLueker zScores Thezscoreforavaluexofarandomvariableisthe numberofstandarddeviationsthatxisabove Ifxisbelow,thenthezscoreisnegative Thezscoreisusedtocomparevaluesfromdifferent normaldistributions Calculating Needtoknow x
School: Kentucky
STA291 Summer2010 Lecture9 DustinLueker NormalDistribution Perfectlysymmetricandbellshaped Characterizedbytwoparameters Mean= StandardDeviation= StandardNormal =0 =1 SolidLine STA291Summer 2 Examples Foranormallydistributedrandomvariable,find thefollowi
School: Kentucky
STA291 Summer2010 Lecture8 DustinLueker ContinuousProbability Distribution Cannotlistallpossiblevalueswithprobabilities Probabilitiesareassignedtointervalsofnumbers Probabilityofanindividualnumberis0 Probabilitieshavetobebetween0and1 Probabilityoftheint
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STA291 Summer2010 Lecture7 DustinLueker ProbabilityTerminology Experiment Random(orChance)Experiment Anyactivityfromwhichanoutcome,measurement,orothersuch resultisobtained Anexperimentwiththepropertythattheoutcomecannotbe predictedwithcertainty Outcome Co
School: Kentucky
STA291 Summer2010 Lecture6 DustinLueker CoefficientofVariation Standardizedmeasureofvariation Idea Astandarddeviationof10mayindicategreatvariabilityor smallvariability,dependingonthemagnitudeofthe observationsinthedataset CV=Ratioofstandarddeviationdivid
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STA291 Summer2010 Lecture5 DustinLueker MeasuresofCentralTendency Mean - Arithmetic Average Mean of a Sample - x Mean of a Population - Median - Midpoint of the observations when they are arranged in increasing order Notation: Subscripted variables n =
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STA291 Summer2010 Lecture3 DustinLueker SamplingPlans SimpleRandomSampling(SRS) StratifiedRandomSampling Thepopulationcanbedividedintoasetofnonoverlappingsubgroups (thestrata) SRSsaredrawnfromeachstrata ClusterSampling Eachpossiblesamplehasthesameprobabil
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STA291 Summer2010 Lecture2 DustinLueker CommonProblemswhen Sampling Conveniencesample Volunteersample Selectingsubjectsthatareeasilyaccessibletoyou Selectingthefirsttwosubjectswhovolunteertotakethe survey Whataretheproblemswiththesesamples? Properrepresen
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STA291 Summer2010 Lecture1 DustinLueker Topics Statisticalterminology Descriptivestatistics Probabilityanddistributionfunctions Inferentialstatistics Estimation(confidenceintervals) Hypothesistesting Simplelinearregressionandcorrelation STA291Summer Wh
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Course: Principles Of Statistics
Module 2 Exam B Statistic plus or minus MOE: Confidence interval Designed to be biased: Push Poll n individuals chosen from the population in such a way that every individual has the same chance of being selected: simple random sample numerical way of ack
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 4 (Practice) Real quiz 4: Thursday, April 19 1. Erectile dysfunction (the persistent inability to achieve or maintain an erection sucient for satisfactory sexual performance) is estimated to aect up to 30 million Amer
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 3 (Practice) Real quiz 3: Thursday, March 29 1. According to the Child Health and Development Study, the average pregnancy length (for women who do not suer a miscarriage) is 279 days, with a standard deviation of 16
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 2 (Practice) Real quiz 2: Thursday, February 23 1. A dental cary is a an invasion of the tooth by microorganisms. Caries develop gradually over time, starting out minor but eventually developing into cavities. I will
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Final (Practice) Real nal: Thursday, April 26, 3:30-5:30 1. (17 points) A study of ozone exposure and asthma conducted at the University of Southern California states that 3535 children with no history of asthma were recru
School: Kentucky
Course: Biostatistics I
STA 580: Biostatistics I Breheny Quiz 1 (Practice) Real quiz 1: Thursday, February 2 1. (17 points) A study published in the British Medical Journal compared the eectiveness of dierent treatments for the treatment of kidney stones. Investigators randomly
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Course: Statistical Method
DISCLAIMER: This practice exam is intended to only supplement your studying of the new material for the final exam. It is neither meant to be taken as a guarantee as to what material will be on the exam, nor is it meant to replace other forms of studying
School: Kentucky
Course: Statistical Method
Multiple-choice answers 1) b. In a one-way ANOVA, the variation that is explained is the variation due to the treatments (a), and (c) is the sum of both the treatment SS and the error SS. The degrees of freedom have nothing to do with variation. 2) b. A f
School: Kentucky
Course: Statistical Method
Multiple Choice 1) In testing the hypotheses H0: p = 0.40 vs. H1: p > 0.40, at the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be: a) to reject H0 b) not
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Course: Statistical Method
Practice Exam 2 Solutions Multiple Choice 1) B 2) B 3) C 4) D 5) A 6) B 7) D Fill-in-the-blank 1) H0: =70, HA: > 70 2) Normal 3) 97 4) True. 5) 461 6) Type II 7) Accept Show-your-work 1) (.685, .815) 2) H0: = 15, HA: < 15 We reject H0 if T.S. < t24, 0.05
School: Kentucky
Course: Statistical Method
Sampling Distributions o Distribution for Sample Mean Expected Value Standard Error o Distribution for Sample Proportion Expected Value Standard Error Population Proportion Estimation o Point estimate o Interval estimate o Z values 90% confidence 9
School: Kentucky
Course: Statistical Method
STA291 Test 2 _ _ Name Instructo r ID _ _ _ Section (or lab time) _ _ Test Section Number Score Correct Multiple/12 choice Fill-in-the-blank Show-your-work (paint problem is 10 pts.) /36 /36 /9 /9 /10 Total /100 Formulas (more on back) For any problem inv
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Course: Statistical Methods
Final Exam Practice Questions STA 291 1. A sales manager was interested in determining if there is a relationship between college GPA and sales performance among salespeople hired within the last year. A sample of recently hired salespeople was selected t
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FINAL EXAM FORMULA SHEET STA 281 () ( ) ( ) if are disjoint, ( ( ( ) () ( () ) () ( () () ) ) ( () ( () [] [] ( [( ( () ) ( ) () ( ( ( ) ) ( ) ) () ()() (|) ( |) ) [ ( )] ) )] Distribution Bernoulli Binomial ) (|) ) (|)() (| )( ( ) (|)() ( ) ) If A, B are
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EXAM2FORMULASHEET STA281 Distribution Bernoulli Binomial P(X=x) 1 1 Poisson ! V(X) 1 1 1 E(X) Hypergeometric 1 Negative Binomial 1 1 1 . . . ~ , 1 1 1
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EXAM 1 FORMULA SHEET STA 281 () ( ( ) ( ) ) ( ) () are disjoint, ( if () ( ( ) ) () ( ) ( () ( ) ( (|) ) () () ( ) () ( () ( ) ( ) ) () If A, B are independent, ( (|) ( ) (|)() [] [ ( )] ( [( [ ] ( [ ]) ) ) ()( [] ()() |) (|)() (| )( (|) [] ) ) )] ( ) ( )
School: Kentucky
STA 291-010 Course Grades Your 4 digit number you provided me before the final is listed along with your score on the final exam as well as your letter grade for the entire course. Have a good summer. Dustin Number Final Exam Course Grade 0148 0572 0706 0
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FINAL EXAM FORMULA SHEET STA 291 SUMMER 2010 SAMPLE MEAN POPULATION MEAN SAMPLE VARIANCE SAMPLE STANDARD DEVIATION POPULATION VARIANCE POPULATION STANDARD DEVIATION BINOMIAL DISTRIBUTION PERCENTILES Z-SCORE CENTRAL LIMIT THEOREM CONFIDENCE INTERVALS where
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EXAM 2 FORMULA SHEET STA 291 SUMMER 2010 Z-SCORE CENTRAL LIMIT THEOREM CONFIDENCE INTERVALS where SAMPLE SIZE
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EXAM 1 FORMULA SHEET STA 291 SUMMER 2010 SAMPLE MEAN POPULATION MEAN SAMPLE VARIANCE SAMPLE STANDARD DEVIATION POPULATION VARIANCE POPULATION STANDARD DEVIATION CONDITIONAL PROBABILITY INDEPENDENCE OR ADDITIVE LAW OF PROBABILITY DISCRETE RANDOM VARIABLES
School: Kentucky
Course: General Statistics
Name: Section: Homework 1 Solutions Chapter 1 Due: 5/11 1. An opinion poll contacts 1000 randomly selected adults from the U.S. and asks them, Please tell if you have bought a lottery ticket in the last 12 months. a. What is the population in this observa
School: Kentucky
Course: General Statistics
Name: Section: Homework 2 Solutions Chapter 2 Due: 5/12 1. Exercise 2.9 from book (page 31). Call-in polls (especially those that cost to call in), and voluntary response polls in general, tend to attract responses from those who have strong opinions on t
School: Kentucky
Course: General Statistics
Name: Section: Homework 3 Solutions Chapter 3 Due: 5/12 1. A professor at a university with 30,000 students plans a survey. He randomly selected 200 students to interview. In the survey, 40% of the 200 students interviewed say they drink soda on a daily b
School: Kentucky
Course: General Statistics
Name: Section: Homework 4 Solutions Chapter 4 Due: 5/13 1. Exercise 4.4 from book (page 72). Explain your answer for all three parts. a. Nonsampling error: this is a response error, and it could happen even if we took a census. b. Nonsampling error: this
School: Kentucky
Course: General Statistics
Name: Section: Homework 5 Solutions Chapter 5 Due: 5/16 1. Although the law doesnt require it, we decide to subject Dr. Moores Indiana Extract to a clinical trial. We hope to show that the extract reduces pain from arthritis. One-hundred patients sufferin
School: Kentucky
Course: General Statistics
Name: Section: Solutions for Suggested Problems from Chapter 6 1. Exercise 6.4 from book (page 115). The ratings were not double-blind because the researcher knew which subjects received the capsaicin and which received the placebo. If the researcher beli
School: Kentucky
Course: General Statistics
Name: Section: Homework 6 Solutions Chapter 10 Due: 5/20 1. A survey of 1000 college freshmen in 2001 asked what field they planned to study. The results: 126 said arts and humanities, 166 said business, 101 said education, 186 said engineering and scienc
School: Kentucky
Course: General Statistics
Name: Section: Homework 7 Solutions Chapter 11 Due: 5/20 1. The following table gives the highway miles per gallon (MPG) for 23 cars. Model Acura 3.5RL Bentley Arnage Cadillac CTS Chevy Malibu Dodge Stratus Honda Accord Hyundai Sonata Infiniti I35 MPG 24
School: Kentucky
Course: General Statistics
Name: Section: Homework 8 Solutions Chapter 12 Due: 5/23 1. Yolanda would like to go to a prestigious graduate school of the arts. The following data represent the dance audition scores of Yolandas group. 50 66 60 72 78 98 42 75 80 64 40 65 92 68 76 89 67
School: Kentucky
Course: General Statistics
Name: Section: Homework 9 Solutions Chapter 13 Due: 5/24 1. George has an average bowling score of 180 and bowls in an amateur league where the average for all bowlers is 150 and the standard deviation is 20. Bill has an average bowling score of 190 and b
School: Kentucky
Course: General Statistics
Name: Section: Homework 10 Solutions Chapter 14 Due: 5/25 1. For a biology project, you measure the length (centimeters) and weight (grams) of 12 crickets. a. Explain why you expect the correlation between length and weight to be positive. Longer crickets
School: Kentucky
Course: General Statistics
Solutions for Suggested Problems from Chapter 15 1. The least-squares regression line for predicting SAT math score from percentage taking is SAT score = (-97.0*proportion taking) + 575.3 a. When describing the relationship between these two variables, ho
School: Kentucky
Name: Section: Homework 1 Solutions Chapter 1 Due: 5/11 1. An opinion poll contacts 1000 randomly selected adults from the U.S. and asks them, Please tell if you have bought a lottery ticket in the last 12 months. a. What is the population in this observa
School: Kentucky
Homework 7 STA 281 Fall 2011 1 A sample of 103 galaxies located in the galaxy cluster A2142 had a mean velocity of kilometers per second (km/s) and a standard deviation of km/s. Suppose your goal is to make an inference about the population mean light ve
School: Kentucky
Homework 6 STA 281 Fall 2011 1 The National Institute for Occupational Safety and Health (NIOSH) recently completed a study to evaluate the level of exposure of workers to the chemical dioxin, 2,3,7,8-TCDD. The distribution of TCDD levels in parts per tri
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Homework 5 STA 281 Fall 2011 1 Let X be a continuous random variable with density ( ) a. Use the pdf to find P(0.2 X < 1.5). b. Calculate E[X]. c. Calculate V[X]. 2 Let X be a continuous random variable with density ( ) a. Find the cdf of X. b. Using the
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Homework 4 STA 281 Fall 2011 1 A toll booth costs 1 dollar for cars and 2 dollars for trucks. Suppose that 30% of the vehicles passing through the booth are trucks. Suppose we observe the next 50 vehicles and observe whether they are cars or trucks, and t
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Homework 3 STA 281 Fall 2011 1 Let X have the following distribution x p(x) 1 0.02 a. b. c. d. 5 0.41 10 0.21 50 0.08 100 0.28 What is P(X>4|X50)? Compute E[X]. Compute E[ ]. Compute V[X]. 2 Suppose X is a random variable with E[X]=4 and V[X]=9. Let Y=4X+
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Homework 1 STA 281 Fall 2011 1 A university plans on conducting a survey of its recent graduates to determine information on their yearly salaries. It randomly selected 200 recent graduates and sent them questionnaires dealing with their present jobs. a.
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Homework 1 Solutions STA 281 Fall 2011 1 A university plans on conducting a survey of its recent graduates to determine information on their yearly salaries. It randomly selected 200 recent graduates and sent them questionnaires dealing with their present
School: Kentucky
WORKSHEET #13 STA 291 Summer 2010 Hypothesis Testing Procedure (P-Value Method) Step 1: State the hypotheses. Step 2: Compute the proper test statistic. Step 3: Use the test statistic to find the p-value (remember to look at the alternative hypothesis to
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WORKSHEET #12 STA 291 Summer 2010 Hypothesis Testing Procedure (P-Value Method) Step 1: State the hypotheses. Step 2: Compute the proper test statistic. Step 3: Use the test statistic to find the p-value (remember to look at the alternative hypothesis to
School: Kentucky
WORKSHEET #11 STA 291 Summer 2010 Hypothesis Testing Procedure (Rejection Region Method) Step 1: State the hypotheses. Step 2: Choose proper test statistic. Step 3: Use the critical value (Z for one tailed test, Z/2 for two tailed test) to set up the reje
School: Kentucky
WORKSHEET #10 STA 291 Summer 2010 Hypothesis-Testing Procedure (P-Value Method) : Step 1: State the hypothesis. Step 2: Compute the test statistic using the formula: Step 3: Find the P-value. Step 4: Make the decision to reject or to not reject the null h
School: Kentucky
WORKSHEET #9 STA 291 Summer 2010 Confidence Interval for the difference of two means (1-2) Both samples are greater than 30. The subscripts represent which sample the values came from. Confidence Interval for the difference of two proportions (p1-p2) Numb
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WORKSHEET #8 STA 291 Summer 2010 Confidence Intervals A confidence interval gives an estimated range of values which is likely to include an unknown population parameter, the estimated range being calculated from a given set of sample data. A confidence i
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WORKSHEET #7 STA 291 Summer 2010 Confidence Intervals A confidence interval gives an estimated range of values which is likely to include an unknown population parameter, the estimated range being calculated from a given set of sample data. A confidence i
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WORKSHEET #6 STA 291 Summer 2010 Central Limit Theorem Suppose we select SRS of size n from any large numerical population with mean and standard deviation . If n is sufficiently large (n > 30), then the sampling distribution of the sample mean X is appro
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WORKSHEET 5 STA 291 Summer 2010 Standardizing If X is distributed as Normal(,), then is distributed as the Standard Normal cfw_Normal(0,1), a normal distribution with mean 0 and standard deviation 1. Notice the form, subtracting E(X) and dividing by SD(X)
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WORKSHEET #3 STA 291 Summer 2010 Discrete Random Variables A random variable is a variable whose value is determined by a chance mechanism. Note: The chance mechanism is formally described by a probability distribution of the possible values of the random
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Name: Section: Solutions for Suggested Problems from Chapter 22 1. In a recent article, it was stated that 40% of U.S. workers have been treated unfairly at work. A CEO for a large company believes that the percentage is lower than 40%. a. State the appro
School: Kentucky
Name: Section: Homework 12 Chapter 21 Due: 6/3 1. In a Gallup poll, 450 out of 1000 U.S. adults surveyed believed that buying and/or wearing fur clothing to be morally unacceptable. It would take too long and cost too much money to survey all U.S. adults,
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Name: Section: Homework 12 Solutions Chapter 21 Due: 6/3 1. In a Gallup poll, 450 out of 1000 U.S. adults surveyed believed that buying and/or wearing fur clothing to be morally unacceptable. It would take too long and cost too much money to survey all U.
School: Kentucky
Name: Section: Homework 11 Chapter 18 Due: 5/31 1. If you draw an M&M candy at random from a bag of the candies, the candy you draw will have one of six colors. The probability of drawing each color depends on the proportion of each color among all candie
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Name: Section: Homework 11 Solutions Chapter 18 Due: 5/31 1. If you draw an M&M candy at random from a bag of the candies, the candy you draw will have one of six colors. The probability of drawing each color depends on the proportion of each color among
School: Kentucky
Suggested Problems from Chapter 15 1. The least-squares regression line for predicting SAT math score from percentage taking is SAT score = (-97.0*proportion taking) + 575.3 a. When describing the relationship between these two variables, how do we know t
School: Kentucky
Solutions for Suggested Problems from Chapter 15 1. The least-squares regression line for predicting SAT math score from percentage taking is SAT score = (-97.0*proportion taking) + 575.3 a. When describing the relationship between these two variables, ho
School: Kentucky
Name: Section: Homework 10 Solutions Chapter 14 Due: 5/25 1. For a biology project, you measure the length (centimeters) and weight (grams) of 12 crickets. a. Explain why you expect the correlation between length and weight to be positive. Longer crickets
School: Kentucky
Name: Section: Homework 9 Chapter 13 Due: 5/24 1. George has an average bowling score of 180 and bowls in an amateur league where the average for all bowlers is 150 and the standard deviation is 20. Bill has an average bowling score of 190 and bowls in a
School: Kentucky
Name: Section: Homework 9 Solutions Chapter 13 Due: 5/24 1. George has an average bowling score of 180 and bowls in an amateur league where the average for all bowlers is 150 and the standard deviation is 20. Bill has an average bowling score of 190 and b
School: Kentucky
Name: Section: Homework 8 Chapter 12 Due: 5/23 1. Yolanda would like to go to a prestigious graduate school of the arts. The following data represent the dance audition scores of Yolandas group. 50 66 60 72 78 98 42 75 80 64 40 65 92 68 a. Find the five-n
School: Kentucky
Name: Section: Homework 8 Solutions Chapter 12 Due: 5/23 1. Yolanda would like to go to a prestigious graduate school of the arts. The following data represent the dance audition scores of Yolandas group. 50 66 60 72 78 98 42 75 80 64 40 65 92 68 76 89 67
School: Kentucky
Name: Section: Homework 7 Chapter 11 Due: 5/20 1. The following table gives the highway miles per gallon (MPG) for 23 cars. Model Acura 3.5RL Bentley Arnage Cadillac CTS Chevy Malibu Dodge Stratus Honda Accord Hyundai Sonata Infiniti I35 MPG 24 14 28 32 2
School: Kentucky
Name: Section: Homework 7 Solutions Chapter 11 Due: 5/20 1. The following table gives the highway miles per gallon (MPG) for 23 cars. Model Acura 3.5RL Bentley Arnage Cadillac CTS Chevy Malibu Dodge Stratus Honda Accord Hyundai Sonata Infiniti I35 MPG 24
School: Kentucky
Name: Section: Homework 6 Solutions Chapter 10 Due: 5/20 1. A survey of 1000 college freshmen in 2001 asked what field they planned to study. The results: 126 said arts and humanities, 166 said business, 101 said education, 186 said engineering and scienc
School: Kentucky
Name: Section: Suggested Problems from Chapter 6 1. Exercise 6.4 from book (page 115). 2. Exercise 6.7 from book (page 116). 3. Exercise 6.22 from book (page 120). Name: Section: 4. Injured knees are repaired by arthroscopic surgery that does not require
School: Kentucky
Name: Section: Solutions for Suggested Problems from Chapter 6 1. Exercise 6.4 from book (page 115). The ratings were not double-blind because the researcher knew which subjects received the capsaicin and which received the placebo. If the researcher beli
School: Kentucky
Name: Section: Homework 5 Chapter 5 Due: 5/16 1. Although the law doesnt require it, we decide to subject Dr. Moores Indiana Extract to a clinical trial. We hope to show that the extract reduces pain from arthritis. One-hundred patients suffering from art
School: Kentucky
Name: Section: Homework 5 Solutions Chapter 5 Due: 5/16 1. Although the law doesnt require it, we decide to subject Dr. Moores Indiana Extract to a clinical trial. We hope to show that the extract reduces pain from arthritis. One-hundred patients sufferin
School: Kentucky
Name: Section: Homework 4 Chapter 4 Due: 5/13 1. Exercise 4.4 from book (page 72). Explain your answer for all three parts. 2. A researcher was interested in the type of people that use the Internet. A survey of users of the Internet found that 60% of Int
School: Kentucky
Name: Section: Homework 4 Solutions Chapter 4 Due: 5/13 1. Exercise 4.4 from book (page 72). Explain your answer for all three parts. a. Nonsampling error: this is a response error, and it could happen even if we took a census. b. Nonsampling error: this
School: Kentucky
Name: Section: Homework 3 Chapter 3 Due: 5/12 1. A professor at a university with 30,000 students plans a survey. He randomly selected 200 students to interview. In the survey, 40% of the 200 students interviewed say they drink soda on a daily basis. a. W
School: Kentucky
Name: Section: Homework 3 Solutions Chapter 3 Due: 5/12 1. A professor at a university with 30,000 students plans a survey. He randomly selected 200 students to interview. In the survey, 40% of the 200 students interviewed say they drink soda on a daily b
School: Kentucky
Name: Section: Homework 2 Chapter 2 Due: 5/12 1. Exercise 2.9 from book (page 31). 2. Your class in ancient Ugaritic religion is poorly taught and has decided to complain to the dean. The class decides to choose 5 of its 58 members at random to carry the
School: Kentucky
Name: Section: Homework 2 Solutions Chapter 2 Due: 5/12 1. Exercise 2.9 from book (page 31). Call-in polls (especially those that cost to call in), and voluntary response polls in general, tend to attract responses from those who have strong opinions on t
School: Kentucky
STA200 Lab9 Name: Section: TheLawofAveragedescribesthebehaviorofexperimentalresultsasthenumberof independenttrialsincreases(e.g.,asweaddmoreflipsofacoinormorespinsofaroulette wheel). TheLawofAverages:Averagesofproportionsarelikelytobemorestablewhentherea
School: Kentucky
Lab8:InClass 1. Thefollowingstatementscontainamistake.Explainwhatiswrong. a. Wefoundacorrelationofr=1.09betweentheheightandweightofAmerican adults. b. Thecorrelationbetweenthegenderofworkersandtheirincomeisr=0.78. c. GotothefollowingWebsite: http:/bcs.whf
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Lab7:InClass Openmywebsitehttp:/web.as.uky.edu/statistics/us ers/dcluek2/ ClickonthelinkforthisclassthenclickonApplets intheupperleft Clickonthethirdimage(itshouldlooklikeanormalc curve).Thiswebpagehasanappletthat s calculatesnormalprobabilities. Ontheapp
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Lab6:InClass Governmentregulationsrequireautomakerstogivethecityandhighwaygasmileageforeach modelofcar.Calculatethefivenumbersummaryforthefollowing: a) Thefollowingdatasetgivesthehighwaymileages(milespergallon)forsedans. 1516161822222323242424242425252626
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Lab5:InClass 1. Sketchlinegraphsofaseriesofobservationsovertimehavingeachofthesecharacteristics. Markyourtimeaxisinyears. a. Astrongdownwardtrend,butnoseasonalvariation. b. Seasonalvariationeachyear,butnocleartrend. c. Astrongdownwardtrendwithyearlyseason
School: Kentucky
Lab4:InClass 1. Doesanewmedicinereducethepainfromaheadache?Aresearchergathered100college studentscurrentlysufferingfromheadachesandgaveallofthemthenewmedicine.The researcherwassurprisedtolearnthat85%ofthestudentshadlesspain. a. Explainwhyweshouldnotputtoo
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Lab3:InClass 1. ANewYorkTimesarticleonattitudestowardthepoliticalpartiesdiscussedtheresultsofa samplesurveythatfound,forexample,that44%ofadultsthinkthatDemocratshavebetter ideasforleadingthecountryintothe21stcentury.Another37%chosetheRepublicans;the other
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Lab2:InClass 1. Arandomsampleof900adultswastakentoestimatethepercentageofalladultsthatfavoran endtotheU.S.embargoagainstCuba.Fromthesample,477favorendingtheembargo. a. Identifythesample. b. Identifythepopulation. c. Identifythestatistic(calculate ). d. Id
School: Kentucky
Name: Section: STA200 Lab1 1. Gotothewebpagehttp:/quickfacts.census.gov/qfd/ ThisisthewebpagefortheUSCensusBureau.Usingthiswebpage: a) Whatistheestimated2009populationofKentucky? b) WhatpercentofKentuckyspopulationlivesbelowthepovertyline accordingtoa2008
School: Kentucky
Course: Principles Of Statistics
William (Jake) Smith Dustin Leuker STA 210-028 1-24-12 Homework: Human Inference Page 33. Of workbook: I read the article online at NHS Choices: Behind the Headlines, it was called Does Fruit and Veg Chemical Fight Cancer? This article was about how eatin
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Course: Nonparametric Statistics
Nonparametric Statistics University of Kentucky STA 621, Fall 2012 Credit: 3.0 Lecture: 12:30 p.m - 1:45 p.m., Tuesdays and Thursdays Room 335, Multidisciplinary Sciences Building (MDS 335) Instructor: Patrick Breheny, Ph.D. Oce: Room 205D, Multidisciplin
School: Kentucky
Course: Nonparametric Statistics
Bayesian Modeling in Biostatistics University of Kentucky BST 701, Spring 2013 Credit: 3.0 Lecture: 3:30 p.m - 4:45 p.m., Tuesdays & Thursdays Room 206, Multidisciplinary Sciences Building (MDS 206) Instructor: Patrick Breheny, Ph.D. Oce: MDS 205D Phone:
School: Kentucky
Course: Nonparametric Statistics
Advanced Regression University of Kentucky BST 760, Spring 2011 Credit: 3.0 Lecture: Lab: 3:30 a.m - 5:20 p.m., Thursdays Room 222, Multidisciplinary Science Building (MDS 222) 3:30 a.m - 5:20 p.m., Tuesdays Room 207, College of Public Health Building (CP
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STA 291-010 STATISTICAL METHODS SUMMER 2010 (Tentative, Tentative, Tentative, ) INSTRUCTOR Dustin Lueker Office: 859D POT Email: dustin.lueker@uky.edu Website: http:/web.as.uky.edu/statistics/users/dcluek2/ Office Hours: By Appointment TEXT Business Stati
School: Kentucky
STA 200-010 STATISTICS A FORCE ON HUMAN JUDGMENT SUMMER I 2011 (Tentative, Tentative, Tentative, ) INSTRUCTOR Dustin Lueker Office: 859D POT Email: dustin.lueker@uky.edu Website: http:/web.as.uky.edu/statistics/users/dcluek2/ Office Hours: By Appointment