Use the normal approximation for the Mann-Whitney U test to analyze the data in Question 24 and state whether to retain or reject the null hypothesis.

In Question 24

With slide show____________________ Without Slide Show

__Presentation ________________________Presentation___

7 ...............................................23

14 ...............................................11

12 ...............................................15

8 ...............................................18

10 ...............................................21

13 ............................................... 5

6 ............................................... 4

9 ...............................................19