Assume that you have a sample of n, -9, with the sample mean X, 46, and a sample standard deviation of S, 4, and you have an independent sample of n = 14 from another population with a sample mean of X-39, and the sample standard deviation S, 8. Construct a 90% confidence interval estimate of the population mean difference between , and Assume that the two population variances are equal. (Round to two decimal places as needed.).