We have previously determined that p1 = 0.52, p2 = 0.37, n1 = 800, and n2 = 800. Also, recall that when the desired confidence level is 95%, the appropriate z critical value is 1.96. Use these values to find the confidence interval, rounding the final values to four decimal places. (p1 p2) (z critical value) p1(1 p1) n1 + p2(1 p2) n2 = (0.52 0.37) 0.52(1 0.52) 800 + 0.37(1 0.37) 800 =