Hint(s) Check My Work (1 remaining) Consider the following data for two independent random samples taken from two normal populations. Excel File: data 10-11.xlsx 10 Sample 1 Sample 2 7 13 7 9 8 7 8 4 6 9 8 a. Compute the two sample means. (to nearest whole number) a 1 1 2 = b. Compute the two sample standard deviations. (to 2 decimals) $1 = 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 two population means? (to 2 decimals and enter negative value as negative number) ( )