# SOLUTION: Need help with this problem thanks Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people a

Algebra ->  Algebra  -> Probability-and-statistics -> SOLUTION: Need help with this problem thanks Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people a      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Algebra: Probability and statistics Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Probability-and-statistics Question 136538: Need help with this problem thanks Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had suffered a heart attack, compared with 97 for the inactive pill. (a) State the appropriate hypotheses. (b) Obtain a test statistic and p-value. Interpret the results at α = .01. (c) Is normality assured? (d) Is the difference large enough to be important? (e) What else would medical researchers need to know before prescribing this drug widely? (Data are from Science News 153 [May 30, 1998], p. 343.) Answer by stanbon(57282)   (Show Source): You can put this solution on YOUR website!Does lovastation (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had suffered a heart attack, compared with 97 for the inactive pill. (a) State the appropriate hypothesis. Ho: p(lovastation)-P(placebo)>=0 Ha: p(lovastation)-p(placebo)<0 ; Ha is the Claim ------------------------- (b) Obtain a test statistic and p-value. I ran a 2-Prop Z Test on a TI calculator to get the following: test statistic: z=-3.9868 p-value = P(-10 < z < -3.9868) = 0.00033496 Interpret the ressults at a=.01 Because the p-value is less than 1%, Reject Ho. The test results support the Claim that lovastation is effective. ------------------------------- (c) is normality assured? I'll let you answer that ------------------------------ (d) Is the difference large enough to be important? The test results show there is a statistically significant difference. -------------------------------- (e) What else would medical researchers need to know before prescribing this drug widely? I'll leave that to you. =============================== Cheers, Stan H.