8.91 Females watching TV The GSS asked in 2008, “On the average day about how many hours do you personally watch television?” Software reports the results for females,

a. Would you expect that TV watching has a normal distribution? Why or why not?

b. On what assumptions is the confidence interval shown based? Are any of them violated here? If so, is the reported confidence interval invalid? Explain.

c. What’s wrong with the interpretation, “In the long run, 95% of the time females watched between 2.88 and 3.28 hours of TV a day.”

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Variable N Mean TV 698 3.080 St Dev SE Mean 2.700 0.102 95% CI (2.879, 3.281)