Use at-distribution to find a confidence interval for the difference in meansd=1-2using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed usingd=x1-x2

.

A95%confidence interval ford ,using the paired data in the following table:

Case situation 1 situation 2

1 76 86

2 80 85

3 93 89

4 62 78

5 69 76

6 70 60

7 85 89

8 91 92

Give the best estimate ford, the margin of error, and the confidence interval.

Enter the exact answer for the best estimate, and round your answers for the margin of error and the confidence interval to two decimal places.

best estimate =______________

margin of error =_____________

The95%confidence interval is= _____________ to______________