The following data are from matched samples taken from two populations.     Population Element 1 2 1 9 6     2 11 15     3 15 12     4 11 12     5 9 13     6 14 6     7 10 11       a. Compute the difference value for each element (difference between element of population 1 and population 2 and enter negative values as negative numbers, if any). If your answer is zero, enter "0".   Element Difference Value 1   2   3   4   5   6   7     b. Compute d (to 3 decimals). Enter negative value as negative number, if any.   c. Compute the standard deviation sd (to 3 decimals).   d. What is the point estimate of the difference between the two population means (to 3 decimals)? Enter negative value as negative number, if any.  e. Provide a 95% confidence interval for the difference between the two population means (to 3 decimals and enter negative values as negative numbers, if any).

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