Chapter 11, Problem 56CRE

Hours of Television by Age Group The StatCrunch output shows the ANOVA results for testing whether there is an association between the number of hours of TV watched per week and age group: 50 and over (AdultTV), college students (TeenTV), and grade school students (ChildTV).

a. Test the hypothesis that people in different age groups spend different amounts of time, on average, watching television. Use a significance level of 0.05. Assume that the conditions for ANOVA are met.

b. Using the output provided, determine which sample means are significantly different from each other. Report all the given confidence intervals for the difference between means, and tell what they show. Then arrange the groups with lowest mean on the left and highest on the right, with underlines connecting groups that do not have significantly different means. Finally, write a sentence or two explaining which group means are different and how they differ.