To learn about TV viewing habits of high school students, each person in a sample of students

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To learn about TV viewing habits of high school students, each person in a sample of students was asked how many hours he or she spent watching TV during the previous week.
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?
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