Question: A sample of n=16 individuals is selected from a normal population with a mean of u=48 and a standard deviation of o=12. After receiving a treatment the sample mean is found to be M=52.

a. If the population standard deviation were o=24 what value would be obtained for Cohen's d? How does the standard deviation influence the measure of effect size

b. If the sample mean were M=56 what value would be obtained for Cohen's d? How does the size of the mean difference influence the measure of effect size?