Television advertisers base their investment decisions ­regarding the promotion of their products and services on demographic information about television viewers. The age of the viewers is a key factor in this process. The following table shows the number of hours that a random sample of individuals watched television ­during the week. The individuals are grouped according to their ages. These data can also be found in the Excel file ­advertisers. xlsx.

a. Perform a one way ANOVA using α = 0.05 to determine if there is a difference in the average number of hours per week of television viewing by the four age groups.
b. If warranted, perform a multiple comparison test to ­determine which pairs are different using α = 0.05.
c. Verify your results with Excel or PHStat.

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