1. The results of a repeated-measures study with n = 25 participants produce a mean difference of My = 1.2 points with SS = 96 for the difference scores and a t statistic of t = 3.00. If the percentage of variance, r^2 is used to measure effect size, then what is the value of r^2? a. 9/33 = 0.27 b. 3/27 = 0.11 C. 1.2/2 = 0.60 d. 1.2/4 = 0.30 3. A research report describing the results from a repeated-measures study states. The data showed a significant difference between treatments, t (22) = 4.71, p < .01. From this report, what can you conclude about the outcome of the hypothesis test? * a. The test rejected the null hypothesis. * b. The test failed to reject the null hypothesis. * c. The test resulted in a Type I error. * d. The test resulted in a Type II error. 4. A repeated-measures study finds a mean difference of My = 5 points between two treatment conditions. Which of the following sample characteristics is most likely to produce a significant t statistic for the hypothesis test? * a. A large sample size (n) and a large variance * b. A large sample size (n) and a small variance * c. A small sample size (n) and a large variance * d. A small sample size (n) and a small variance