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

Treatment I II III n 5 5 n 5 5 n 5 5 M 5 1 M 5 5 M 5 6 N 5 15 T 5 5 T 5 25 T 5 30 G 5 60 s 2 5 9.00 s 2 5 10.00 s 2 5 11.00 SX2 5 430 SS 5 36 SS 5 40 SS 5 44

a. Use an ANOVA with a 5 .05 to determine whether there are any significant differences among the three treatment means. Note: Because the samples are all the same size, MSwithin is the average of the three sample variances.

b. Calculate h2 to measure the effect size for this study.