The following data summarize the results from an independent-measures study comparing three treatment conditions.

 I                 II             III

n  = 6       n  = 6       n = 6

M  =1      M  = 5      M = 6          N = 18

T  = 6      T  = 30      T = 36        G = 72

SS = 30    SS =35    SS = 40   ?X2(x square) = 477

a. Use an ANOVA with  α = .05 to determine whether there are any significant differences among the three treatment means.

b. Calculate ?2 (? square) to measure the effect size for this study.

c. Write a sentence demonstrating how a research report would present the results of the hypothesis test and the measure of effect size.