Consider the following data for two independent random samples taken from two normal populations. Excel File: data10-11, xdsx a. Compute the two sample means. (to nearest whole number) x1= x2= b. Compute the two sample standard deviations. (to 2 decimals) s1= s2= c. What is the point estimate of the difference between the two population means? d. What is the 90% confidence interval estimate of the difference between the fwo population means? (to 2 decimals and enter negative value as negative number)