1. An article reported on an experiment in which 13 computer-proficient medical professionals were timed retrieving images from a library of slides and then retrieving the same image from a computer database. a. Assuming that the differences are normally distributed and that this is a paired situation, test the hypothesis that themean difference is 14 at =0.10 b. Assume that the data come from two normal distribution, these distributions are independent and the variances are not equal, test the hypothesis that the mean difference is 14 at =0.10 c. Assume that the data come from two normal distribution, these distributions are independent and the variances are equal, test the hypothesis that the mean difference is 14 at =0.10 d. Do the decisions agree?

Slide	Digital	Diff
90	85	5
35	16	19
40	15	25
50	35	15
80	70	10
30	20	10
35	7	28
62	16	46
70	45	25
51	13	38
25	11	14
42	19	23
24	10	14