28. Refer to Problem 125 When these subjects were asked to rate conservatives. the mean responses were 61.9 during 1983-87 and 60.7 during 1988-91. Explain why a two-way ANOVA using time (1983-87. 1988-91) and group rated (Liberal, Conservative) as fac- tors would require methods for repeated measures Identify the within-subjects and between-subjects factors. Would you expect the test of no interaction to yield a small P-value? Explain.