(Solved): 11) Captopril is a drug designed to lower systolic blood pressure. When subjects were treated with ...

11) Captopril is a drug designed to lower systolic blood pressure. When subjects were treated with this drug, their systolic blood pressure readings (in \( \mathrm{mm} / \mathrm{Hg} \) ) were measured before and after the drug was taken. Results are given in the table below (based on data from "Essential Hypertension: Effect of an Oral Inhibitor of Angiotensin-Converting Enzyme," by MacGregor et al., British Medical Journal, Vol. 2). Using a \( 0.02 \) significance level, is there sufficient evidence to support the claim that captopril is effective in lowering systolic blood pressure? Assume that the dependent sample has been randomly selected from a normal distribution. 12) A claimed trend of thinner Miss America winners has generated charges that the contest encourages unhealthy diet habits among young women. Listed below are body mass indexes (BMI) for recent Miss America winners. Test the claim that recent winners are from a population with a mean BMI less than 20.16, which was the BMI for winners from the 1920 s and 1930s. Assume that the sample has been randomly selected from a population with a normal distribution.