Question 1

Which of the following is an example of ratio-level data?

Accepted Answer

Weight of a package in kilograms

Question 2

A bank collects data on the marital status of its loan customers (single, married, divorced, other). What is the level of measurement for this data?

Accepted Answer

Nominal

Question 3

Which of the following best describes time-series data?

Accepted Answer

Data collected from the same individual at multiple points in time

Question 4

A frequency distribution is constructed for the number of ride-sharing trips taken by city employees in a month. If 5 employees took 0 trips, 4 took 1 trip, 5 took 2 trips, 1 took 3 trips, and 1 took 4 trips, what is the relative frequency for employees who took 2 trips?

Accepted Answer

$$\frac{5}{16} = 0.3125$$

Question 5

Which of the following is NOT a criterion for constructing grouped data frequency distributions?

Accepted Answer

Classes must be empty

Question 6

A histogram is used to:

Accepted Answer

Display the distribution of a quantitative variable

Question 7

Which of the following statements about bar charts is TRUE?

Accepted Answer

The height of each bar represents the frequency or percentage of observations in a category

Question 8

A pie chart is most appropriate for displaying:

Accepted Answer

The proportion of categories in a categorical variable

Question 9

Which of the following best describes a stem and leaf diagram?

Accepted Answer

It shows individual data values and the overall distribution for a quantitative variable

Question 10

In a scatter diagram, which variable is typically plotted on the x-axis?

Accepted Answer

Independent variable

Question 11

A company wants to analyze the relationship between advertising budget and sales revenue. Which graphical tool should they use?

Accepted Answer

Scatter diagram

Question 12

Which of the following is a key feature of a Pareto chart?

Accepted Answer

It highlights the most significant factors by arranging bars from high to low

Question 13

If a dataset contains the following variables: College Name, State, Public/Private Code, Math SAT, and In-State Tuition, which are qualitative variables?

Accepted Answer

College Name, State, and Public/Private Code

Question 14

Which of the following is TRUE about interval data?

Accepted Answer

Interval data can be rank-ordered and have equal distances between values

Question 15

A relative frequency histogram differs from a frequency histogram in that:

Accepted Answer

The vertical axis shows relative frequencies instead of frequencies

Question 16

Which of the following is the correct formula for calculating relative frequency?

Accepted Answer

$$	ext{Relative Frequency} = \frac{	ext{Frequency of the ith value}}{	ext{Total number of observations}}$$

Question 17

Which of the following best describes cross-sectional data?

Accepted Answer

Data collected from different subjects at a single point in time

Question 18

A joint frequency distribution is used to:

Accepted Answer

Analyze the relationship between two variables

Question 19

Which of the following is a characteristic of continuous data?

Accepted Answer

It can assume any value within an interval

Question 20

If a histogram shows data that is spread out from the center, what does this indicate?

Accepted Answer

The data has high variation

Data Types, Graphs, Charts, and Tables—Describing Your Data

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