Construct a confidence interval for p1 - p2 at the given level of confidence.
X1 = 25, n1 = 257, X2 = 35, n2 = 312, 90% confidence
The researchers are 90% confident the difference between the two population proportions, P1 - P2, is between and (Use ascending order: Type an integer or decimal rounded to three decimal places as needed:)