Problem 2 a} How does the sample size required change in order to detect small. medium and large effect sizes? b} Produce a graph that shows this change. c] Why does the sample size required change 1.Iirith effect size? Hints: Cohen (1988} suggests that values of 0.2, I15 and 0.8 represent small, medium and large elTect sizes, represectiyely. Determine the sample size required for an 80% chanoe of correctly rejecting the null hypothesis with a 1d% chance of incorrectly rejecting the null hypothesis. Use a two-sided, one sample ttest procedure