A sample is selected from a population with pi = 13. After a treatment is administered to the individuals in the sample, the mean is found to be M = 10 and the variance is s2 = 9.00. Round to three decimal places as needed. a. For a sample of n = 16 scores, carry out all 4 steps of a hypothesis test to evaluate the signicance of the treatment effect. Use a two-tailed test with an alpha level of .05. b. Calculate Cohen's d to measure the size of the treatment effect