Does Lovastatin reduce the risk of heart attack?
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Does Lovastatin reduce the risk of heart attack? In texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2081 people. After 5 years, 57 of the patients had suffered a heart attack, compared with 97 for the inactive pill.
a) State the appropriate hypothesis.
b) Obtain a test statistic and p value. Interpret the results at a=.01
c) Is normality assured?
d) Is the difference large enough to be important?
e) What else would doctors need to know before prescribing the drug widely?
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Solution Summary
This response conducts a hypothesis test on the question: "Does Lovastatin reduce the risk of heart attack?"
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a)
Ho: There is no significant difference between Lovastatin and the inactive pill.
Ha: There is significant difference between Lovastatin and the inactive pill.
b)
The test statistic is
Z = (p1-p2)/√PQ(1/n1 +1/n2)
P = (n1p1+n2p2)/(n1+n2)
p1 ...
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