Instructor's Solution Manual for Elementary Statistics: Picturing the World 8th Edition by Ron Larson, Chapter 1-11 | All Chapters

INSTRUCTOR’S
SOLUTIONSMANUAL
AS A
S




NANCY S. BOUDREAU AND JAY SCHAFFER
AS AS AS AS AS




ELEMENTARY STATISTICS : AS




P ICTURING THE WORLD
AS AS AS




SIXTH E DITION A S




Ron Larson
as




Pennsylvania State University
as as




Betsy Farber as




Bucks County Community College
as as as

,CONTENTS


CONTENTS

Chapter 1 as Introduction to Statistics
as as 1

Chapter 2 as Descriptive Statistics a s 15

Chapter 3 as Probability 103

Chapter 4 as Discrete Probability Distributions
a s a s 134

Chapter 5 as Normal Probability Distributions
a s a s 163

Chapter 6 as Confidence Intervals a s 212

Chapter 7 as Hypothesis Testing with One Sample
as as as as 237

Chapter 8 as Hypothesis Testing with Two Samples
as as as as 281

Chapter 9 as Correlation and Regression
as as 322

Chapter 10 as Chi-Square Tests and the F-Distribution
as as as as 369

Chapter 11 as Nonparametric Tests a s 419

Appendix A as Alternative Presentation of the Standard
as as as as 464
Normal Distribution
as as




Appendix C as Normal Probability Plots and Their
as as as as 465
Graphs
as




Activities 467

Case Studies
as 471

Uses and Abuses
as as 491

Real Statistics−Real Decisions
a s a s 495

Technology 505

, CHAPTER
Introduction to Statistics as as


1
1.1 AN OVERVIEW OF STATISTICS as as as as




1.1 Try It Yourself Solutions as as as




1a. The population consists of the prices per gallon of regular gasoline at all gasoline stations in
a s as as as as as as as as as as as as as as as



the United States. The sample consists of the prices per gallon of regular gasoline at the 800
as as as as as as as as as as as as as as as as as



surveyed stations.
as as




b. The data set consists of the 800 prices.
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2a. Because the numerical measure of $5,150,694 is based on the entire collection of employee’s
a s as as as as as as as as as as as as as



salaries, it is from a population.
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b. Because the numerical measure is a characteristic of a population, it is a parameter.
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3a. Descriptive statistics involve the statement ―31% support their kids financially until they
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graduate college and 6% provide financial support until they start college.‖
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b. An inference drawn from the survey is that a higher percentage of parents support their kids
as as as as as as as as as as as as as as as as



financially until they graduate college.
as as as as as




1.1 EXERCISE SOLUTIONS as




1. A sample is a subset of a population.
as as as as as as as




2. It is usually impractical (too expensive and/or time consuming) to obtain all the population data.
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3. A parameter is a numerical description of a population characteristic. A statistic is a
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numerical description of a sample characteristic.
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4. The two main branches of statistics are descriptive statistics and inferential statistics.
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5. False. A statistic is a numerical measure that describes a sample characteristic.
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6. True

7. True

8. False. Inferential statistics involves using a sample to draw conclusions about a population.
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9. False. A population is the collection of all outcomes, responses, measurements, or counts that
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are of interest.
as as as




10. False. A sample statistic can differ from sample to sample.
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1

, 2 CHAPTER 1 │ as a s a s INTRODUCTION TO as


STATISTICS
11. The data set is a population because it is a collection of the revenue of each of the 30
as as as as as as as as as as as as as as as as as as



companies in the Dow Jones Industrial Average.
as as as as as as as




12. The data set is a population because it is a collection of the energy collected from all the
as as as as as as as as as as as as as as as as as



wind turbines on the wind farm.
as as as as as as




13. The data set is a sample because the collection of the 500 spectators is a subset within
as as as as as as as as as as as as as as as as



the population of the stadium’s 42,000 spectators.
as as as as as as as




14. The data set is a population because it is a collection of the annual salaries of all pharmacists at
as as as as as as as as as as as as as as as as as as



a pharmacy.
as as




15. The data set is a sample because the collection of the 20 patients is a subset of the population
as as as as as as as as as as as as as as as as as as



of 100 patients at the hospital.
as as as as as as




16. The data set is a population because it is a collection of the number of televisions in all
as as as as as as as as as as as as as as as as as



U.S. households.
as as




17. The data set is a population because it is a collection of all the golfers’ scores in the tournament.
as as as as as as as as as as as as as as as as as as




18. The data set is a sample because only the age of every third person entering the clothing store
as as as as as as as as as as as as as as as as as



is recorded.
as as




19. The data set is a population because it is a collection of all the U.S. presidents’ political parties.
as as as as as as as as as as as as as as as as as




20. The data set is a sample because the collection of the 10 soil contamination levels is a subset
as as as as as as as as as as as as as as as as as



of the population.
as as as




21. Population: Parties of registered voters in Warren County
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Sample: Parties of Warren County voters responding to online survey
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22. Population: All students who donate at a blood drive as as as as as as as as




as Sample: The students who donate and have type O+
as as as as as as as as




blood
as




23. Population: Ages of adults in the United States who own cell phones
as as as as as as as as as as as




as Sample: Ages of adults in the United States who own Samsung cell
as as as as as as as as as as as




as phones

24. Population: Incomes of all homeowners in Texas as as as as as as




Sample: Incomes of homeowners in Texas with mortgages
as as as as as as as




25. Population: Collection of the responses of all adults in the United States
as as as as as as as as as as as




as Sample: Collection of the responses of the 1015 U.S. adults surveyed
as as as as as as as as as as