Discussion:
Q: 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?