find the standardized test statistic estimate, z, to test the hypothesis that p1 > p2. use 0.01. the sample statistics listed below are from independent samples.
sample statistics: n1 = 100, x1 = 38, and n2 = 140, x2 = 50 a.0.638 b.0.362 c.2.116 d.1.324 100, 38, and 140, 50