Assume that you plan to use a significance level of a = 0.05 to test the claim that PI = P2. Use the given sample sizes and numbers of successes to find the z test statistic for the hypothesis test.
2) A random sampling of sixty pitchers from the National League and fifty-two pitchers from the American League showed that 19 National and 11 American League pitchers had E.R.A's below 3.5.
A) z = 1.629 B) z = 191.183 C) z = 15.457 D) z = 1.253