3. 10 pts. The following is a random sample of values of weight measured before and after a weight-reduction program: subject 1 2 127 130 126 124 129 135 123 127 124 127 129 128 132 136 125 130 135 131 10 126 128 At the .05 level of significance, test there is a difference between the mean weight before and after the program. Find a 95% confidence interval for the difference between the mean weight before and after the program