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Test Bank for Introductory Statistics, 3rd Edition,

Robert N. Gould, Rebecca Wong Colleen Ryan

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Ch. 1 Introduction to Data

1.1 What Are Data?

1 Understand Concepts Regarding Data

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Answer the question.

1) Data can be defined as numbers in context. Suppose you are given the following set of numbers:

1.73, 1.83, 1.57, 1.88, 1.70, 1.65

What additional information would allow you to define these numbers as data?

A) Units of measurement. This could represent the heights of six 5-year-olds, in meters.

B) Units of measurement. This could represent the heights of six 20 -year-olds, in meters.

C) We need to know where these numbers were collected.

D) We need to know who collected these numbers.

Answer: B

2) Data can be defined as numbers in context. Suppose you are given the following set of numbers:

18, 22, 22, 20, 19, 21

What additional information would allow you to define these numbers as data?

A) We need to know where these numbers were collected.

B) We need to know who collected these numbers.

C) Units of measurement. This could represent the ages of six high school students.

D) Units of measurement. This could represent the ages of six college students.

Answer: D

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

3) Give an example of how data could be collected about you on a daily basis.

Answer: Answers will vary. Examples might include: Facebook postings, Twitter tweets, Instagram photos,

emails sent/received, credit/debit card swipes, GPS, text messaging, etc.

1.2 Classifying and Storing Data

1 Understand the Fundamentals of Statistics

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Solve the problem.

1) A statistics student collected data from other students in her class who ride a bike to school. The following table

shows data about their bikes:

Color Series Number Weight (lbs) Road Bike Average Speed (mph)

Black A120 32 0 16

Blue B640 22 1 24

Green C300 26 0 14

Black D90 16 1 23

How many variables are there?

A) 5 B) 4 C) 20 D) 7

Answer: A

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2) A statistics student collected data from other students in her class who ride a bike to school. The following table

shows data about their bikes:

Color Series Number Weight (lbs) Road Bike Average Speed (mph)

Black A120 32 0 16

Blue B640 21 1 24

Green C300 29 0 14

Black D90 14 1 23

Observations were made on how many bikes?

A) 4 B) 5 C) 20 D) 7

Answer: A

3) In a recent school poll, the administrators asked if students were satisfied with the schoolʹs course offerings.

What is the population of interest here?

A) All students who are satisfied with the course offerings.

B) All students who are not satisfied with the course offerings.

C) All students who attend the school.

D) All students who participated in the poll.

Answer: C

4) In a recent high school poll, the principal asked if students were satisfied with the amount of after-school

activities offered. What is the population of interest here?

A) All students who attend the school.

B) All students who participated in the poll.

C) All students who are satisfied with the amount of after-school activities that are offered.

D) All students who are not satisfied with the amount of after-school activities that are offered.

Answer: A

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

5) In a recent survey at UCLA, some incoming freshmen students were asked if they planned to take more than

one math class before they graduated. What is the population of interest here and what is the sample?

Answer: The population is the entire freshman class at UCLA. The sample includes the particular freshmen who

participated in the survey.

2 Distinguish Between Numerical and Categorical Variables

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Solve the problem.

1) The average gas mileage of the top selling mini-vans for each U. S. car manufacturer is an example of what

type of variable?

A) Numerical variable B) Categorical variable C) Neither

Answer: A

2) A state senatorʹs comments about the dangers of global warming are an example of what type of variable?

A) Numerical variable B) Categorical variable C) Neither

Answer: C

3) Marital status of each member of a randomly selected group of adults is an example of what type of variable?

A) Numerical variable B) Categorical variable C) Neither

Answer: B

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