LAB ACTIVITY 1
(Use Class Survey Dataset in Angel.
Lab Quiz 1 is on activities 1 4.)
Activity 1: Types of variables
a. Identify the following variables as quantitative or categorical. (If quantitative
Solution
Activity 1 Solution
Problem 1 (BY HAND type in your work):
Consider the following three sets of sample observations:
Set 1: 8, 9, 10, 11, 12
Set 2: 8, 9, 10, 11, 100
Set 3: 8, 9, 10, 11, 1000
Solutions
Sampling Distributions (4 questions)
1. Using a college cost estimator, the average of campus rental at Penn State is approximately $547 per
month. Suppose these rates are roughly normal wit
Solutions
Continuous Distributions (4 questions)
1. A World Health Organization study of health in various countries reported that in Canada, the systolic
blood pressure readings (i.e. this is the top
Statistics 200: Lab Activity 5
Learning objectives from Lecture / Lab 5:
Recognize the uses and meaning of the standard deviation.
Compute and interpret a z-score; use the 95% rule.
Use range, interqu
Statistics 200: Lab Activity 3
Learning objectives from Lecture / Lab 3:
Use information about a categorical variable to find a proportion, with correct notation.
Display information from a categorica
Statistics 200: Lab Activity 4
Learning objectives from Lecture / Lab 4:
Use a dotplot, histogram, or boxplot to describe the shape of a distribution.
Find the mean and median for a set of data values
Statistics 200: Lab Activity 2
Learning objectives from Lecture / Lab 2:
Recognize that not every association implies causation
Distinguish between experiments and observational studies, recognizing t
Statistics 200: Lab Activity 6
Learning objectives from Lecture / Lab 6:
Describe an association displayed in a scatterplot.
Explain what a positive or negative association means between two variables
Statistics 200: Lab Activity 8
Learning objectives from Lecture / Lab 8:
Use a description of a study to evaluate the method of data collection and to identify relevant
variables
Use the method of dat
Statistics 200: Lab Activity 7
Learning objectives from Lecture / Lab 7:
Calculate predicted values from a regression line
Calculate residuals and visualize residuals on a scatterplot
Beware of extrap
Two Different Quantitative Variables:
Continued
Stat 200 Sections 1-4
Wed Oct 1, 2014
LQ4 Available
HW4 (opens on Thurs)
Exam 2 Study Guide posted by late Fri
1
Exam 1
r = .632
2
Question on Lecture Q
Inference: Confidence Intervals
Stat 200 Sections 1-4
Mon Oct 13, 2014
LQ10 available as usual
Last day to inquire about clickers
1
Exam 2 Results
Item
Q1
Exam 2
72
(100 pts)
Median
Q3
Max
Mean
St dev
LAB ACTIVITY 20 (More on proportions)
Activity 1:
A Gallup poll asked the question, In general, do you feel that the laws covering the sale of firearms should be made: more strict, less strict, or kep
LAB ACTIVITY 12 (Continuous Random Variables: Sections 8.5, 8.6)
To find probabilities for a normal random variable in Minitab, use:
Calc probability distributions normal
To find P(X is less than or e
LAB ACTIVITY 23 (Review)
Activity 1:
The High School and Beyond data is from a large-scale longitudinal study conducted by the National
Opinion Research Center (1980) under contract with the National
LAB ACTIVITY 19
(Confidence Intervals for the Population Mean of Paired Differences AND
Confidence Intervals for the Difference in Two Population Means (Independent Samples)
To understand the context
LAB ACTIVITY 16 (Hypothesis tests One proportion)
Quiz will be on activity 1
P-value Guidelines when using Standard Normal Table (i.e. the Z-table):
Keep this in mind: The method for finding the p-val
ESL015 Section 003
Self-study Homework
Due Saturday April 9th 11:59 pm
Type in your answers and then upload it to Angel drop box:
Homework, peer review, reading assignments > Self-study homework drop
This corresponds to lectures 15 to 23 on Angel.
Sampling distributions (chapter 9)
population parameter = population mean = u
population standard deviation = o
sample mean= the mean of this sample, al
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Gathering Data (7 problems)
Problem 1:
Study 1: A British study compared 966 patients with brain cancer to 1716 patients without brain cancer.
The patients cell phone use was measured using a question
Displaying Data
Data Set used for this activity: Class Survey
1 Suppose a medical researcher compares the average blood pressures of women
who take oral contraceptives to the blood pressures of women
Confidence Intervals Proportion and One Mean
1 The term sampling frame refers to the group that actually had a chance to get into the sample. Ideally,
this is the same as the population of interest, b
Sampling Distributions
No Data Set Needed
1 Suppose that medical researchers want to estimate the true proportion of all teenagers with
high blood pressure whose blood pressure would decrease if they
Sampling
No data sets used for this activity
Non-response bias refers to a bias that occurs if people with a particular opinion or trait tend to refuse
to answer certain survey questions (or possibly
Analysis of Variance (ANOVA)
One-way analysis of variance is a method for comparing several population means, when the
data are from independent samples. It can be thought of as a tool for examining t
Probability
No Data Set Needed
1.1 Situation: The High School and Beyond data is from a large-scale longitudinal study
conducted by the National Opinion Research Center (1980) under contract with the
Comparing Two Categorical Variables
Data Sets Needed: Class Survey and HSB data sets
1: Sleep apnea is a pattern of irregular breathing during sleep, with longer than normal breath-holding
intervals.