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, INSTRUCTOR’S
SOLUTIONS MANUAL
DIACRITECH
E LEMENTARY S TATISTICS :
P ICTURING THE W ORLD
SEVENTH EDITION
Ron Larson
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Pennsylvania State University
The Behrend College
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Betsy Farber
Bucks County Community College
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,CONTENTS
Chapter 1 Introduction to Statistics 1
Chapter 2 Descriptive Statistics 14
Chapter 3 Probability 104
Chapter 4 Discrete Probability Distributions 139
Chapter 5 Normal Probability Distributions 172
Chapter 6 Confidence Intervals 225
Chapter 7 Hypothesis Testing with One Sample 254
Chapter 8 Hypothesis Testing with Two Samples 308
Chapter 9 Correlation and Regression 355
Chapter 10 Chi-Square Tests and the F-Distribution 407
Chapter 11 Nonparametric Tests 465
Appendix A Alternative Presentation of the Standard 516
Normal Distribution
Appendix C Normal Probability Plots 517
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Activities 518
Case Studies 526
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Uses and Abuses 552
Real Statistics−Real Decisions 563
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Technology 577
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Copyright © 2019 Pearson Education, Inc.
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, CHAPTER
Introduction to Statistics
1
1.1 AN OVERVIEW OF STATISTICS
1.1 TRY IT YOURSELF SOLUTIONS
1. The population consists of the responses of all ninth to twelfth graders in the United States. The
sample consists of the responses of the 1501 ninth to twelfth graders in the survey. The sample data
set consists of 1215 ninth to twelfth graders who said leaders today are more concerned with their
own agenda than with achieving the overall goals of the organization they serve and 286 ninth to
twelfth graders who did not say that.
2a. Population parameter, because the total spent on employees’ salaries, $5,150,694, is based on the
entire company.
b. Sample statistic, because 43% is based on a subset of the population.
3a. The population consists of the responses of all U.S. adults, and the sample consists of the responses of
the 1000 U.S. adults in the study.
b. The part of this study that represents the descriptive branch of statistics involves the statement “three
out of four adults will consult with their physician or pharmacist and only 8% visit a medication-
specific website [when they have a question about their medication].”
c. A possible inference drawn from the study is that most adults consult with their physician or
pharmacist when they have a question about their medication.
1.1 EXERCISE SOLUTIONS
@
1. A sample is a subset of a population.
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 numerical
description of a sample characteristic.
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.
6. True
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7. True
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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 are of
interest.
1
Copyright © 2019 Pearson Education, Inc.
ia
uv
sst
lu
Ap
@
, INSTRUCTOR’S
SOLUTIONS MANUAL
DIACRITECH
E LEMENTARY S TATISTICS :
P ICTURING THE W ORLD
SEVENTH EDITION
Ron Larson
@
Pennsylvania State University
The Behrend College
Ap
Betsy Farber
Bucks County Community College
lu
s st
uv
ia
,CONTENTS
Chapter 1 Introduction to Statistics 1
Chapter 2 Descriptive Statistics 14
Chapter 3 Probability 104
Chapter 4 Discrete Probability Distributions 139
Chapter 5 Normal Probability Distributions 172
Chapter 6 Confidence Intervals 225
Chapter 7 Hypothesis Testing with One Sample 254
Chapter 8 Hypothesis Testing with Two Samples 308
Chapter 9 Correlation and Regression 355
Chapter 10 Chi-Square Tests and the F-Distribution 407
Chapter 11 Nonparametric Tests 465
Appendix A Alternative Presentation of the Standard 516
Normal Distribution
Appendix C Normal Probability Plots 517
@
Activities 518
Case Studies 526
Ap
Uses and Abuses 552
Real Statistics−Real Decisions 563
lu
Technology 577
s st
uv
Copyright © 2019 Pearson Education, Inc.
ia
, CHAPTER
Introduction to Statistics
1
1.1 AN OVERVIEW OF STATISTICS
1.1 TRY IT YOURSELF SOLUTIONS
1. The population consists of the responses of all ninth to twelfth graders in the United States. The
sample consists of the responses of the 1501 ninth to twelfth graders in the survey. The sample data
set consists of 1215 ninth to twelfth graders who said leaders today are more concerned with their
own agenda than with achieving the overall goals of the organization they serve and 286 ninth to
twelfth graders who did not say that.
2a. Population parameter, because the total spent on employees’ salaries, $5,150,694, is based on the
entire company.
b. Sample statistic, because 43% is based on a subset of the population.
3a. The population consists of the responses of all U.S. adults, and the sample consists of the responses of
the 1000 U.S. adults in the study.
b. The part of this study that represents the descriptive branch of statistics involves the statement “three
out of four adults will consult with their physician or pharmacist and only 8% visit a medication-
specific website [when they have a question about their medication].”
c. A possible inference drawn from the study is that most adults consult with their physician or
pharmacist when they have a question about their medication.
1.1 EXERCISE SOLUTIONS
@
1. A sample is a subset of a population.
2. It is usually impractical (too expensive and/or time consuming) to obtain all the population data.
Ap
3. A parameter is a numerical description of a population characteristic. A statistic is a numerical
description of a sample characteristic.
4. The two main branches of statistics are descriptive statistics and inferential statistics.
lu
5. False. A statistic is a numerical measure that describes a sample characteristic.
6. True
s
7. True
st
8. False. Inferential statistics involves using a sample to draw conclusions about a population.
uv
9. False. A population is the collection of all outcomes, responses, measurements, or counts that are of
interest.
1
Copyright © 2019 Pearson Education, Inc.
ia
