In a comparative study of two new drugs, A and B, 120 patients were treated with drug A and 150 patients with drug B, and the following results were obtained. Drug A Drug BCured 50 88Not Cured 70 62Total 120 150
a) Do the results demonstrate a significantly higher cure rate with Drug B than Drug A? Test at 5% significance level.
b) Construct a 95% confidence interval for the difference in the cure rates of the two drugs.