statistics
posted by G. .
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 pvalue. 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 2sample ztest 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 onetailed test.