SOLUTIONS MANUAL
** All Chapters included
** Exercise solutions
** Review exercise solutions
** Quiz solutions
** Test solutions
** Statsgrader Answers (Excel)
,Table of Contents are given below
1. Introduction to Statistics
2. Descriptive Statistics
3. Probability
4. Discrete Probability Distributions
5. Normal Probability Distributions
6. Confidence Intervals
7. Hypothesis Testing with One Sample
8. Hypothesis Testing with Two Samples
9. Correlation and Regression
10. Chi-Square Tests and the F-Distribution
11. Nonparametric Tests
, 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 teens in the United States. The sample consists of the
responses of the 846 teens in the survey. The sample data set consists of the 525 teens who said
generative artificial intelligence will help them learn things they will need to know in their future
careers and 321 teens who did not.
2a. Population parameter, because the total spent on employees’ salaries, $5,150,694, is based on the
entire company.
b. Sample statistic, because 14% 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 2000 U.S. adults surveyed.
b. The statement, “Thirty-eight percent of the respondents said 7 to 10 seconds,” represents the
descriptive branch of statistics.
c. A possible inference drawn from the study is that nearly two in five U.S. adults are willing to wait 7
to 10 seconds for a website to load.
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.
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.
5. False. A statistic is a numerical description of a sample characteristic.
6. True
7. True
8. False. Inferential statistics involves using a sample to draw conclusions about a population.
9. False. A population is the collection of all outcomes, responses, measurements, or counts that are of
interest.
1
, 2 CHAPTER 1 │ INTRODUCTION TO STATISTICS
10. False. A sample statistic can differ from sample to sample.
11. Population, because it is a collection of the years of service of each member of a volunteer fire
department.
12. Population, because it is a collection of the water consumed by each home in the service area of a
water treatment plant.
13. Sample, because the collection of 100 voters is a subset of the population of all voters at the polling
station.
14. Population, because it is a collection of the revenue of each team that leads its division in a pro sports
league.
15. Sample, because the collection of the 5 oxygen levels of the patient is a subset of all oxygen levels for
the patient during the ambulance transport.
16. Population, because it is a collection of every U.S. adult who is turning 65.
17. Population, because it is the collection of the grade point averages for each student in the graduating
class.
18. Population, because it is the collection of each donation made for a fundraising platform.
19. Sample, because only the age of every fourth dog at an animal shelter is recorded.
20. Sample, because the collection of the 12 wind velocity measurements are a subset of the population.
21. Population: Marriage status of voters
Sample: Marriage status of voters who respond to a survey
22. Population: Types of housing of college students
Sample: Types of housing of freshmen
23. Population: Ages of motor vehicle owners
Sample: Ages of sports car owners
24. Population: Incomes of skiers in Vermont
Sample: Incomes of skiers in Vermont who are private ski resort members
25. Population: Collections of the responses of all U.S. adults
Sample: Collection of the responses of the 750 U.S. adults surveyed
Sample data set: 39% of adults who have a favorable view of Cuba and 61% who do not
26. Population: Collection of the gut microbiomes of all infants
Sample: Collection of the gut microbiomes of 227 U.S. infants
Sample data set: The gut microbiomes of infants and their health
27. Population: Collection of the responses of all U.S. parents with children younger than 18
Sample: Collection of the responses of 3757 U.S. parents with children younger than 18 surveyed
** All Chapters included
** Exercise solutions
** Review exercise solutions
** Quiz solutions
** Test solutions
** Statsgrader Answers (Excel)
,Table of Contents are given below
1. Introduction to Statistics
2. Descriptive Statistics
3. Probability
4. Discrete Probability Distributions
5. Normal Probability Distributions
6. Confidence Intervals
7. Hypothesis Testing with One Sample
8. Hypothesis Testing with Two Samples
9. Correlation and Regression
10. Chi-Square Tests and the F-Distribution
11. Nonparametric Tests
, 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 teens in the United States. The sample consists of the
responses of the 846 teens in the survey. The sample data set consists of the 525 teens who said
generative artificial intelligence will help them learn things they will need to know in their future
careers and 321 teens who did not.
2a. Population parameter, because the total spent on employees’ salaries, $5,150,694, is based on the
entire company.
b. Sample statistic, because 14% 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 2000 U.S. adults surveyed.
b. The statement, “Thirty-eight percent of the respondents said 7 to 10 seconds,” represents the
descriptive branch of statistics.
c. A possible inference drawn from the study is that nearly two in five U.S. adults are willing to wait 7
to 10 seconds for a website to load.
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.
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.
5. False. A statistic is a numerical description of a sample characteristic.
6. True
7. True
8. False. Inferential statistics involves using a sample to draw conclusions about a population.
9. False. A population is the collection of all outcomes, responses, measurements, or counts that are of
interest.
1
, 2 CHAPTER 1 │ INTRODUCTION TO STATISTICS
10. False. A sample statistic can differ from sample to sample.
11. Population, because it is a collection of the years of service of each member of a volunteer fire
department.
12. Population, because it is a collection of the water consumed by each home in the service area of a
water treatment plant.
13. Sample, because the collection of 100 voters is a subset of the population of all voters at the polling
station.
14. Population, because it is a collection of the revenue of each team that leads its division in a pro sports
league.
15. Sample, because the collection of the 5 oxygen levels of the patient is a subset of all oxygen levels for
the patient during the ambulance transport.
16. Population, because it is a collection of every U.S. adult who is turning 65.
17. Population, because it is the collection of the grade point averages for each student in the graduating
class.
18. Population, because it is the collection of each donation made for a fundraising platform.
19. Sample, because only the age of every fourth dog at an animal shelter is recorded.
20. Sample, because the collection of the 12 wind velocity measurements are a subset of the population.
21. Population: Marriage status of voters
Sample: Marriage status of voters who respond to a survey
22. Population: Types of housing of college students
Sample: Types of housing of freshmen
23. Population: Ages of motor vehicle owners
Sample: Ages of sports car owners
24. Population: Incomes of skiers in Vermont
Sample: Incomes of skiers in Vermont who are private ski resort members
25. Population: Collections of the responses of all U.S. adults
Sample: Collection of the responses of the 750 U.S. adults surveyed
Sample data set: 39% of adults who have a favorable view of Cuba and 61% who do not
26. Population: Collection of the gut microbiomes of all infants
Sample: Collection of the gut microbiomes of 227 U.S. infants
Sample data set: The gut microbiomes of infants and their health
27. Population: Collection of the responses of all U.S. parents with children younger than 18
Sample: Collection of the responses of 3757 U.S. parents with children younger than 18 surveyed
