Supposing that you've a sample of n1 = 9 with sample mean X1 = 45 and sample standard deviation of S1 = 7 and you've an independent sample of n2 - 14 from another population with the sample mean of X2 =36, and the sample standard deviation S2 =6. Construct a 95% confidence interval estimate of the population mean difference between u1 and u2.
____ less than or equal to u1 - u2 less than or equal_______
(type an integer or decimal round to two decimal places as needed.)