To learn about what super power middle school students would most like to have, each person in a sample of middle school students was asked to choose among invisibility, extreme strength, the ability to freeze time, and the ability to fly.
Answer the following three questions and then use Figure 2.2 to select an appropriate graphical display.
Question 1: How many variables are in the data set?
Question 2: Is the data set categorical or numerical?
Question 3: Would the purpose of a graphical display be to summarize the data distribution, to compare groups, or to investigate the relationship between two numerical variables?