Question 1

Which of the following best describes the type of data shown in a pie chart representing 'Housing Types for Students in a Statistics Class'?

Accepted Answer

Qualitative (categorical)

Question 2

A bar graph is used to display which type of variable?

Accepted Answer

Qualitative (categorical)

Question 3

In the histogram titled 'Heights of Adult Men', what is the shape of the distribution?

Accepted Answer

Symmetric

Question 4

Which of the following graphs would be most appropriate to display the change in the Consumer Price Index (CPI) over time?

Accepted Answer

Line graph

Question 5

Given the bar graph 'Generational Divide Over American Exceptionalism', which of the following is a critical component that must be included for proper interpretation?

Accepted Answer

A title, axis labels, and a source

Question 6

A histogram is different from a bar graph in that:

Accepted Answer

The bars in a histogram touch and represent quantitative data

Question 7

If a data set consists of the number of students in each class at a university, what type of data is this?

Accepted Answer

Quantitative, discrete

Question 8

Which of the following best describes the distribution shown in the 'Skewed-Right Distribution' histogram?

Accepted Answer

Most data are on the left, with a tail to the right

Question 9

A stem-and-leaf plot is most useful for which of the following purposes?

Accepted Answer

Showing the distribution of quantitative data while retaining original values

Question 10

In the pie chart 'Housing Types for Students in a Statistics Class', what is the central angle for the 'Dorm' category, which represents 31% of students? Use the formula $$ 	ext{Angle} = 360^\circ 	imes 	ext{Relative Frequency} .$$

Accepted Answer

$$ 112^\circ $$

Question 11

Which of the following is a potential problem with pictographs, as shown in the example comparing correct and incorrect pictographs for housing costs?

Accepted Answer

They can exaggerate differences by using area or volume instead of height

Question 12

A frequency distribution is most useful for which of the following?

Accepted Answer

Summarizing how many data values fall into each class or category

Question 13

Which of the following is NOT a characteristic of a well-constructed graph?

Accepted Answer

It should distort the scale to emphasize trends

Question 14

If a histogram has a long tail on the left side, how would you describe its shape?

Accepted Answer

Skewed to the left

Question 15

Which of the following is an example of continuous data?

Accepted Answer

Heights of doors

Question 16

A time-series graph is best used for which of the following scenarios?

Accepted Answer

Displaying the change in average temperature over several decades

Question 17

In a stem-and-leaf plot of starting salaries for accountants, what does the 'stem' represent if the key is $$ 40 \mid 7 = \40$$,700 $?

Accepted Answer

The first two digits of the salary in thousands

Question 18

Which of the following is a reason to check the scaling of axes when analyzing a graph?

Accepted Answer

To avoid misinterpretation due to stretched or compressed axes

Question 19

If you want to compare the same categories for different groups, which type of bar graph should you use?

Accepted Answer

Side-by-side bar graph

Question 20

Which of the following best describes the data shown in the table 'Percentage of residents aged 65 and over in the states, July 2008'?

Accepted Answer

Quantitative, continuous

Variables and Graphs: Describing Data with Tables and Graphs

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