Practice Questions for Exam 2: STAT 251, Fall 2013, Prof. Walker
The exam covers Ch. 7, 8 (except 8.3), 9 (except 9.4 and 9.5), and Sections 24.10 and 24.11. In Ch. 8 and 9, only the
Geometric, Binomial, Hypergeometric, Uniform, and Normal were covered. Y
03-Two independent samples (3rd ed.Ch: 13.1-13.4)
Stat 252 Fall 2016
1
TWO SAMPLE t-test:
Example1: State the null and alternative hypotheses for parts a) d)
a) Who spends more on their vacations, golfers or skiers?
H0:
HA:
b) Is fast-food drive-through w
Lab#3 ANOVA vs Two groups
Assigned on Friday, Oct 7th, 2016
Lab #3: ANOVA vs Two sample t-test/Paired t-test. (due Tuesday, October 11th, 2016)
Stat252 Fall 2016
For this lab you are expected to type your answers and attach the appropriate JMP outputs (cu
Stat252 Fall 2016Handout#1 Confidence Interval/Hypotheses (Review Ch: 11-12)
1
Hypothesis test and Confidence Interval for population mean.
Example1: (from Lab#1) With skyrocketing prices of gold and silver, companies that use precious metals in their
man
Stat252 Fall2016
Handout 05 Two sample t-test vs. Dependent t-test
1
Example 1: (work in groups) Dependent or Independent samples? For each situation below identify whether the samples
should be analyzed as two independent or paired t-test. And explain wh
Stat252 Fall 2016
Homework#1 due Friday, Sept 30th , 2016
1
Homework#1 Due Friday, Sept 30th ,2016 in class!
You may work in a group of at most 3 people on this assignment, handing in one homework
from your group. Word-processed reports are preferred, but
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data.#,#a#utf-8#A#7#D
#utf-8#Warning
#C#7This data table had been saved in a more recent
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this table with this version of JMP will destroy the
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Stat252 Fall 2016
Lab #1 September 16th, 2016
1
Lab #1: Introduction to JMP and review a one sample t-test/CI (CH 9 -12)
Windows: Start JMP by going to All Programs in the Start Menu
MAC: Double click your hard drive icon, double click Applications, then
STAT 252 Fall2016
Lab#3-ANOVA-assumptions: 20.7 and multiple comparisons
1
Example: Job Offers by Majors ( Using JMP)
We performed by hand calculations for this example. But we need to check assumptions in order to be able to summarize
our conclusion
(Che
03-Two independent samples (3rd ed.Ch: 13.1-13.4)
Stat 252 Fall 2016
1
TWO SAMPLE t-test:
Example1: State the null and alternative hypotheses for parts a) d)
a) Who spends more on their vacations, golfers or skiers?
H0:
HA:
b) Is fast-food drive-through w
Stat252 Fall 2016Handout#1 Confidence Interval/Hypotheses (Review Ch: 11-12)
1
Hypothesis test and Confidence Interval for population mean.
Example1: (from Lab#1) With skyrocketing prices of gold and silver, companies that use precious metals in their
man
Stat252 Fall2016
Handout 05 Two sample t-test vs. Dependent t-test
1
Example 1: (work in groups) Dependent or Independent samples? For each situation below identify whether the samples
should be analyzed as two independent or paired t-test. And explain wh
STAT 252 Fall2016
Lab#3-ANOVA-assumptions: 20.7 and multiple comparisons
1
Example: Job Offers by Majors ( Using JMP)
We performed by hand calculations for this example. But we need to check assumptions in order to be able to summarize
our conclusion
(Che
Stat252 Fall 2016Handout#1 Confidence Interval/Hypotheses (Review Ch: 11-12)
1
Hypothesis test and Confidence Interval for population mean.
Example1: (from Lab#1) With skyrocketing prices of gold and silver, companies that use precious metals in their
man
Stat252 Fall 2016
Lab#2 Two sample t-test
Friday, Sept 30th
Friday, September 30th, 2016. Lab #2: Two sample t-test.
For this lab you are expected to type your answers and attach the appropriate JMP outputs (cut and paste
in the solution).
We will work to
Experiment or experimental studies:
Comparing Two (or More!) Populations
Types of Studies
(chapter 20)
Population #1
Compares the outcomes from two or more treatments.
Researcher controls what the subjects do in the study.
Subjects are randomly assigne
Stat252 Fall 2016
Lab#2 Two sample t-test
Friday, Sept 30th
Friday, September 30th, 2016. Lab #2: Two sample t-test.
For this lab you are expected to type your answers and attach the appropriate JMP outputs (cut and paste
in the solution).
We will work to
Stat 252Fall 2016
06 example ANOVA- by hand (3rd edition: 20.6 )
1
ANOVA is a hypothesis testing procedure that is used to evaluate mean difference between two or more treatments
(populations). We will use sample data as the basis for drawing general conc
#utf-8#Warning
#C#7This data table had been saved in a more recent
format.#BIt is not compatible with the format known to this version of
JMP.#Please do not save this table#ASaving
this table with this version of JMP will destroy the
data.#]#utf-8#AA#7#De
Stat252 Fall 2016
Lab #1 September 16th, 2016
1
Lab #1: Introduction to JMP and review a one sample t-test/CI (CH 9 -12)
Windows: Start JMP by going to All Programs in the Start Menu
MAC: Double click your hard drive icon, double click Applications, then
STAT 251
Homework Assignment #3/4
TEMPLATE
Chapter 5
33) Real Estate. In a sample of real estate ads, 64% of homes for sale had garages, 21% have swimming
pools, and 17% have both features. What is the probability that a home for sale has:
a) A pool, a ga
STAT 251: STATISTICAL INFERENCE FOR MANAGEMENT I
EXAM #2 Review Solutions
These questions do NOT cover all of the material for Exam #2. Do not restrict your
studying to just these problems. You should review the homeworks, handouts, practice
problems, and
STAT 251
Homework Assignment #6
TEMPLATE
Chapter 6
1) A pharmaceutical company has developed a drug to restore hair growth in men. Like most drugs, this
product has potential side effects. One of these side effects is increased blood pressure. The FDA has
STAT 251
Homework Assignment #7
TEMPLATE
Chapter 9
14) A survey of 200 students is selected randomly on a large university campus. They are asked if they use a
laptop in class to take notes. The result of the survey is that 70 of the 200 students responde
STAT 251
Solutions: Homework Assignment #4
Problems:
Chapter 5: 16 (you may want to work on this problem after we cover Bayes Rule), 42, 47, 48, 49 (you may
want to work on this problem after we cover Bayes Rule), 54, 58, 60, 63, 68
Lies
OR
49.
a.
Contrac
STAT 251
Solutions: Homework Assignment #3
Problems:
Chapter 5: See below for #1 and #2, Book: 6, 7, 9, 11, 12, 26, 34, 36, 39, 40
1. Pizza Discount. A local pizza restaurant has a spinner with 6 spaces on it. The spaces are the same size
(1/6 of the whee
STAT 251: STATISTICAL INFERENCE FOR MANAGEMENT I
EXAM #2 Review Questions
These questions do NOT cover all of the material for Exam #1. Do not restrict your studying to just
these problems. You should review the homeworks, handouts, practice problems, and
STAT 251: STATISTICAL INFERENCE FOR MANAGEMENT I
EXAM #3 Review Solutions
These questions do NOT cover all of the material for Exam #3. Do not restrict your studying to just
these problems. You should review the homeworks, handouts, practice problems, and
STAT 251: STATISTICAL INFERENCE FOR MANAGEMENT I
EXAM #3 Review Solutions
These questions do NOT cover all of the material for Exam #3. Do not restrict your studying to just
these problems. You should review the homeworks, handouts, practice problems, and