Construct a confidence interval for p 1 minus p 2 at the given level of confidence. x 1 equals395​, n 1 equals 538​, x 2 equals 444​, n 2 equals 572​, 90​% confidence The researchers are 90 90​% confident the difference between the two population​ proportions, p 1 minus p 2​, is between .733 . 733 and .776 . 776.