Question 1

Which of the following best describes qualitative (categorical) data?

Accepted Answer

Data that represents names or labels, such as eye color or nationality.

Question 2

Which type of graph is most appropriate for displaying the distribution of a single categorical variable such as nationality?

Accepted Answer

Pie Chart

Question 3

A researcher collects data on the test scores of 100 students. Which of the following graphs would be most appropriate to display this quantitative data?

Accepted Answer

Histogram

Question 4

In a bar chart for qualitative data, how are the bars typically arranged?

Accepted Answer

Randomly or in any order

Question 5

Which of the following statements about pie charts is correct?

Accepted Answer

Pie charts show the proportion of each category as a percent of the total.

Question 6

A stemplot (stem-and-leaf plot) is most useful for which type of data?

Accepted Answer

Quantitative data such as test scores

Question 7

Which of the following is a key difference between a histogram and a bar chart?

Accepted Answer

A histogram displays quantitative data with adjacent bars, while a bar chart displays qualitative data with separated bars.

Question 8

If you want to compare the frequencies of different eye colors in a classroom, which graph would be most appropriate?

Accepted Answer

Bar Chart

Question 9

Given the following test scores: 68, 72, 75, 80, 85, 88, 90, which of the following would be the correct stem for a stemplot representing these scores?

Accepted Answer

$$6, 7, 8, 9$$

Question 10

A frequency polygon is constructed by:

Accepted Answer

Connecting the midpoints of the tops of the bars in a histogram with straight lines.

Question 11

Which of the following best describes the difference between qualitative and quantitative data?

Accepted Answer

Qualitative data consists of names or labels, while quantitative data consists of numerical values.

Question 12

In a real-world scenario, a hospital records the blood types of 200 patients. Which type of data is this, and which graph would best display it?

Accepted Answer

Qualitative data; Pie Chart

Question 13

A teacher wants to show the distribution of students' heights in a class. Which graphical method should she use?

Accepted Answer

Histogram

Question 14

Which of the following is NOT a characteristic of a histogram?

Accepted Answer

Displays data as percentages of a whole.

Question 15

A Pareto chart is a special type of bar chart where:

Accepted Answer

Bars are arranged in descending order of frequency.

Question 16

Which of the following is a correct statement about stemplots?

Accepted Answer

Stemplots preserve the original data values.

Question 17

A frequency polygon is most similar to which other type of graph?

Accepted Answer

Line Graph

Question 18

If a data set consists of the number of pets owned by each student in a class, which type of data is this?

Accepted Answer

Quantitative

Question 19

Which of the following is the best reason to use a bar chart instead of a histogram?

Accepted Answer

You are displaying the frequencies of categories such as types of fruit.

Question 20

A company wants to show the percentage of its employees in different departments. Which graph should they use?

Accepted Answer

Pie Chart

Visualizing Qualitative vs. Quantitative Data in Statistics

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