Question: An advertising agency prepares three different commercials for a new outdoor grill. One commercial shows a man cooking, another shows a woman cooking, and a third shows a family enjoying food that has just been prepared on the grill. To determine whether the commercials are equally effective, 10 participants rate the commercials on a set of questions, whose ratings range from 0 to 30. At the 5% level of risk, test whether the three commercials are equally effective for satisfaction. Use Excel for processing.

(a) Paste your Excel printout here or attach it to this assignment.

(b) Analyze the results in terms of the F critical value and the obtained F. Explain whether all three commercials would be equally effective in mean satisfaction based on the sample means for satisfaction. Do follow up tests need to be conducted to determine which commercial is most effective or least effective?