icantly higher exam scores. 16. To evaluate the effect of a treatment, a sample is ob- tained from a population with a mean of u = 20, and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to m be M = 21.3 with a variance of s = 9. a a. Assuming that the sample consists of n = 16 individuals, use a two-tailed hypothesis test with a = .05 to determine whether the treatment effect is significant and compute both Cohen's d and r b. to measure effect size. Are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with a = .05? C. b. Assuming that the sample consists of n = 36 indi- viduals, repeat the test and compute both measures of effect size. 20. O c. Comparing your answers for parts a and b, how m does the size of the sample influence the outcome to of a hypothesis test and measures of effect size