The following information was obtained from two independent samples selected from two normally distributed populations with unknown but equal standard deviations. Sample 1 13 14 9 12 10 5 10 9 12 16 Sample 2 16 18 11 19 14 17 13 16 17 18 22 12 a. Let / be the mean of population 1 and #2 be the mean of population 2. What is the point estimate /] - #2? Round your answer to two decimal places. The point estimate /] - /2 is 5.36 b. Determine the 95% confidence interval for #] - #2- Round your answers to two decimal places. The 95% confidence interval for #1 - /2 is from i to C. Test at the 2.5% significance level if , is lower than #2- is not lower v than #2