6.15 TV watching A social scientist uses the General Social Survey (GSS) to study how much time per day people spend watching TV. The variable denoted by TVHOURS at the GSS Web site measures this using the discrete values 0, 1, 2, c , 24.

a. Explain how, in theory, TV watching is a continuous random variable.

b. An article about the study shows two histograms, both skewed to the right, to summarize TV watching for females and males. Since TV watching is in theory continuous, why were histograms used instead of curves?

c. If the article instead showed two curves, explain what they would represent.