Use the normal distribution to find a confidence interval for a difference in proportions , - P2 given the relevant sample results. Assume the results come from random samples. A 90% confidence interval for P1 - P2 given that p, = 0.20 with n = 60 and p2 = 0.40 with n2 = 100 Give the best estimate for P1 - P2, the margin of error, and the confidence interval. Round your answer for the best estimate to two decimal places and round your answers for the margin of error and the confidence interval to three decimal places. Best estimate : i -0.2 Margin of error : i Confidence interval : to