Practice Two Proportions Hypothesis Test (z test)

Researchers wish to test the effectiveness of a new antiviral drug for Ebola. In clinical trials 92 out of 200 taking the drug show improvement of symptoms while 64 out of 200 taking a placebo show improvement.

Is this drug more effective than the placebo at reducing symptoms.

Test using alpha = 0.05

Question 2 P= (P1 * n1 + P2" n2) / (n1 + 12) P1 - P2 Z=- p(1- p) _ _ m n2 pland p2are the sample proportions of samples 1 and 2 n, and n are the sample sizes of samples 1 and 2 P1 P2 P Z