1. As part of a study investigating the effects of vigorous exercise on risk of coronary heart disease, researchers measured HDL concentrations (mg/dL) in a sample of 19 male marathon runners as well as in a sample of 32 men who do not regularly exercise. The data are summarized below: Marathon runners Do not exercise Assuming all relevant assumptions pass, run the appropriate test to determine if there is a signicant difference between marathon runners and men who don't exercise. Given: critical = 2.00 and SEpooged = 2.43 mg/dL (4ptS)