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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.
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