Suppose that you plan to employ a significance level of ? = 0.05 to test the claim that p1 = p2, Employ the given sample sizes and numbers of successes to find the pooled estimate P (with a line above it) Round your answer to the nearest thousandth.
n1 = 570 n2 = 1992
x1 = 143 x2 = 550
a. 0.541
b. 0.270
c. 0.520
d. 0.21