ESSENTIAL S TATISTICS:

TEST BANK

NANCY BOUDREAU

ESSENTIAL S TATISTICS:

EXPLORING

THE WORLD THROUGH DATA

SECOND E DITION

Robert Gould Colleen Ryan Rebecca Wong 1 / 3

Chapter 1 Test A 1-1

Copyright © 2017 Pearson Education, Inc.Chapter 1 Test A - Multiple Choice

Section 1.1 (What are Data?)

• [Objective: Understand data.] 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?

• Units of measurement. This could represent the heights of six 5-year-olds, in meters.
• Units of measurement. This could represent the heights of six 20-year-olds, in meters.
• We need to know where these numbers were collected.
• We need to know who collected these numbers.

Section 1.2 (Classifying and Storing Data)

• [Objective: Understand methods for coding categorical variables.] According to the following data

table, which variable(s) is (are) categorical?

Age Gender Weight Ethnicity

23 1 180 1

18 0 126 0

20 0 139 2

19 1 154 1

20 1 202 3

• None are categorical because there are only numbers in the table
• Age, gender, and ethnicity
• Gender and ethnicity
• Gender

• [Objective: Distinguish between stacked and unstacked data.] The following data table is organized

using which method?

Men’s Ages Women’s Ages 35 42 39 33 41 37 37 35 40 39

• This is stacked data because the ages are separated by groups (in this case, gender).
• This is stacked data because each row represents one person.
• This is unstacked data because the ages are separated by groups (in this case, gender).
• This is unstacked data because each row represents one person. 2 / 3

1-2 Chapter 1 Test A

Copyright © 2017 Pearson Education, Inc.

• [Objective: Distinguish between numerical and categorical variables.] Determine which of the

following five variables are numerical and which are categorical.

age, gender, weight, ethnicity, favorite math class

• All of the variables are categorical.
• All of the variables are numerical.
• Age, weight, and favorite math class are numerical variables. Gender and ethnicity are

categorical variables.

• Age and weight are numerical variables. Gender, ethnicity, and favorite math class are

categorical variables.

• [Objective: Distinguish between a population and a sample.] In a recent school poll, the

administrators asked if students were satisfied with the school’s course offerings.What is the population of interest here?

• All students who are satisfied with the course offerings.
• All students who are not satisfied with the course offerings.
• All students who attend the school.
• All students who participated in the poll.

Section 1.3 (Organizing Categorical Data)

6. [Objective: Understand what types of variables are used in two-way

tables.] A two-way table is useful for describing which types of variables?

• Two numerical variables.
• Two categorical variables.
• One numerical variable.
• One numerical variable and one categorical variable.

• [Objective: Find and use rates (including percentages).] In a study of 1200 adults, 480 out of the

630 women in the study said they attended a state college or university. What percent of the study’s participants were women?

• 40%
• 47.5%
• 52.5%
• 76.2%
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