To evaluate the effect of a treatment, a sample is obtained froma population with a mean of μ = 20 and the treatment isadministered to the individuals in the sample. After treatment, thesample mean is found to be M = 21.3 with a variance of s2 = 9. a.Assuming that the sample consists of n = 16 individuals, use atwo-tailed test with α =0.05 to determine whether the treatmenteffect is significant and compute both Cohen's d and r2 to measureeffect size. are the data sufficient to conclude that the treatmenthas a significant effect ? b. Assuming that the sample consists ofn = 36 individuals, repeat the test and compute both measures ofeffect size? c. Comparing your answers for parts a and b, how doesthe size of the sample influence the outcome of a hypothesis testand the measurement of effect size?
