Using Question 12, assume that each of the three groups of respondents had been divided into two groups: younger (under 30) and older (over 30). The revised ANOVA table was as follows:

a. What are the F-ratio and p-value associated with the hypothesis test that there is no advertisement effect? Why is it different from that in Question 6? Notice that the total SS and the advertisement SS have not changed.
b. Test the hypothesis that there is no age effect.

Transcribed Image Text:

Source of Variation Due to advertisements Due to age Unexplained Total df MSS F-Ratio p-Value 12 24 210 246 6.0 24.0 2 116 1.81 119