Assume that you have a sample of n1=7 with the sample mean x1=42 and a sample standard deviation of s1=6 and you have an independent sample of n2=17 from another population with a sample mean of X2=37 and the sample standard deviation s2=8. Construct a 99% confidence interval estimate of the population mean difference between u1 and u2. Assume that the two population variances are equal.
