Exercise 10.44: Does lovastatin (a cholesterol-lowering drug) reduce the risk of

Question

Exercise 10.44: Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin (L) to 2,325 people (Group 1) and an inactive substitute (I) to 2,081 (Group 2) people (average age 58). After 5 years, 57 of the lovastatin group had suffered a heart attack, compared with 97 for the inactive pill. Set a = .01

Which of the following is the null hypothesis for this problem if the proportion of lovastatin is pL and
the proportion of inactive substitute is pI?
A. pL=pI B. pL<pI C. pL>pI D. pL=pI E. pL=pI

Explanation / Answer

Ho: p(inactive) - P(active) =0 ------> p(inactive) = p(active)

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