Does lovastatin 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. 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 a = .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?
You can also use a binomial proportion 2-sample z-test for this type of problem. Look at my response to your previous post to see how to set up this problem. Remember that this will also be a one-tailed test.
