2. The data in the following table compares the mean triceps skin-fold thickness in a group of normal men with a group of men with chronic airow limitation: Group H Mean Standard Deviation Normal 40 1.35 0.50 Chronic Airow Limitation 32 0.92 0.40 The normal men were recruited from a random sample of patients of Dr. No, and the Chronic Airow Limitation patients were recruited from a random sample of men Visiting the Cardiovascular clinic in Metropolis. a. For each group: i. Compute the standard error of the mean. ii. Give the 95% condence interval for the population mean. b. What can you conclude from the analyses in part (a)? c. For the normal group, compute the 90% and 99% condence intervals for the mean. i. Present the two condence intervals. ii. Which interval is wider