1. Hallux abducto valgus (called HAV) is a deformation of the
big toe that is not common in youth and often requires
surgery. Metatarsus adductus (called MA) is a turning in of
the front part of the foot that is common in adolescents
and usually corrects
Practice Exam 1
Winter 2013
Stat 121 Practice Exam 1
1. Which one of the following will change the appearance of a histogram?
(a) changing the width of the intervals
(b) changing the leaf unit
(c) changing the y axis from frequency to percentage
(d) chang
For x = 14, y^ = 14.2 and y = 12.6, what is the value of the residual?Residual=observed ypredicted y=yy^=12.614.2=1.6
What is an influential observation? An observation that, if removed, would drastically change the values of slope and/or y-intercept.
Is
An explanatory variable is a type of independent variable. The two terms are often used interchangeably. But there is a subtle
difference between the two. When a variable is independent, it is not affected at all by any other variables. When avariable isn
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Researching the Best
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Dashboard Statistics Stat 121 Independent Study Section M003 Lesson 5 Credit Quiz 5
Started on Sunday, 26 June 2016, 1:43 PM
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Finished
Completed on Sunday, 26 Ju
Dr. Nelson, I have prayed for help and have been directed to
you. The Lord will not reveal to me how to repair that second
valve, but He can reveal it to you. Your mind is so prepared. If
you will operate upon me, the Lord will make it known to you
what t
Medical/Dental School
General Considerations
Choice of Major
It doesnt make a difference.
Other Considerations:
Science preparation
AP/CLEP/IB credit
Post-bac courses/program
Grad school
Prerequisites:
Do NOT have to be completed by time of
applicati
MCAT/DAT
Standardized test used as part of
medical/dental school admissions
process.
(Required by every US
medical/dental school.)
MCAT
Computer
based examination. Offered
ONLY 14 times in 2015, at Prometric
Centers.
DAT
Administered
at Prometric Center
LETTERS OF
RECOMMENDATION
Letters of
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Very important factor in
getting you a professional
school interview.
Good LORs Require:
Advance planning
Initiative
Work
Generally Need:
Science faculty (2)
Another faculty major, research
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PERSONAL
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The character of a man
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Meender
Personal Statement
One of the key factors in getting
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Unlike LORs, you have complete
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Personal stateme
Confidence Interval Estimation
STATE:
What is a 90% confidence interval estimate for the mean daily number of hours all college
students spend using the Internet?
Answer all the following questions in complete sentences when applicable.
PLAN:
(1)
One samp
Credit Quiz 11: Random Variables and Probability Distributions
Score: 10110 (100%)
1. The following histogram displays a sample of female bear weights. Which density curve would be the best model for the weights ofthese female bears? 1/1
mama mul- nun
Credit Quiz 10: Introduction to Probability
Score: 10110 (100%)
1. Choose the probability that best matches the following statement: "This event is very unlikely, but it will occur once in a while in along 1/1
sequence of trials."
0.0
if 0.05
0.3
0.6
0.95
9. Referrin to the eight possible arran
can Xta e, and what are the probab
Valueofx 1 2 3
lebability 1/8 1/8 1/8
Izm. u:
ii
ements of girls and boys you wrote down, nd the distribution ofX(the number of girls the couple has). That is, what value
4. Refer to the table in the previous question. What is the probability that students take at least ve courses (i.e., ve courses or more)? 1/1
0.0032
0.05
0.21
0.40
v 0.61
0.95
5. What does the distribution of a random variable give us? 1/1
The measure of
7.
9.
10.
Suppose you have played a game many, many timeswinning sometimes and losing sometimes. Can you use the results of playing the
game to predict with absolute certainty whether you will win the game on the next try?
V
YES
No
In statistics, how do w
Unit 6: Examining Q to Q Relationships
Lesson 34: Scatterplots and Correlation
1 / 40
Examining Relationships
Case Q Q
2 / 40
Case Q Q
Explanatory
Response
Categorical
Quantitative
Categorical
CC
CQ
Quantitative
QC
QQ
3 / 40
Case Q Q
data set consists of
Unit 6: Examining Q to Q Relationships
Lesson 35: Linear Regression and r-squared
1 / 46
Introduction to Linear Regression
2 / 46
Case Q Q
Explanatory
Response
Categorical
Quantitative
Categorical
CC
CQ
Quantitative
QC
QQ
3 / 46
Correlation
one-number su
Unit 2: Quantitative Data Analysis
Lesson 12: Normal Probability Distribution and its Applications
1 / 30
Normal Distributions
2 / 30
3 / 30
Normal Distributions
famous, common family of density curves
4 / 30
Notation: Density Curves vs. Histograms
The no
27
Examining Relationships
for Pairs of Variables
2 / 25
Number of Variables
1
2
Pattern of Interest
distribution
relationship
3 / 25
Relationships
data set consists of 2 variables for each individual
want to investigate the relationship between the var
Unit 5: Examining C to C Relationships
Lesson 33: Chi-Square Test for Independence
1 / 43
Chi-Square Test for
Independence
2 / 43
Multi-Sample Inference for Proportions: Chi-Square for
Tables of Counts
3 / 43
CC
1-Sample Inference
intervals and tests for
Unit 2: Quantitative Data Analysis
Lesson 21: One-sample t-test for means
1 / 34
The t-Procedures for the
Population Mean ( unknown)
2 / 34
Realistic Inference about a
Population Mean
3 / 34
4 / 34
Inference for
Unrealistically simple case:
conclusion a
Unit 2: Quantitative Data Analysis
Lesson 23: Error Probabilities and Power of a Test
1 / 38
Error Probabilities
and Power of a Test
2 / 38
Desirable Properties of Tests of Significance
Low risk of false positive
a study with this is safe
Low risk of f
Unit 6: Examining Q to Q Relationships
Lesson 36: Cautions in Correlation and Regression Analysis
1 / 24
Avoid Extrapolation When Calculating y
Extrapolation: use of regression line to estimate mean of y for
x far outside x-range of data
Problem: no infor
Unit 5: Examining C to C Relationships
Lesson 32: Two-Sample z-Procedures for Proportions
1 / 37
Two-Sample z-Procedures for
Proportions
2 / 37
Inference for Two Proportions
3 / 37
Outline
1 p
2 for SRSs from
1. investigate sampling distribution of p
two