Use a significance level of 0.01 to test the claim that p1 = p2. Use the given sample sizes and numbers of success to find
(a) the pooled estimate p(hat),
(b) the z statistics,
(c) the critical Z-values, and
(d) the P-value.
Treatment Group Placebo Group
n1 = 600 n2 = 400
x1 = 60 x2 = 50