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A professor has a teaching assistant record the amount of time (in minutes) that a sample...

A professor has a teaching assistant record the amount of time (in minutes) that a sample of 16 students engaged in an active discussion. The assistant observed 8 students in a class who used a slide show presentation and 8 students in a class who did not use a slide show presentation.

With Microsoft
PowerPoint		 Without
Microsoft
PowerPoint
12 13
4 15
7 18
11 19
10 14
23 8
9 21
5 6

Use the normal approximation for the Mann-Whitney U test to analyze the data above. (Round your answer to two decimal places.)

Math   Statistics-And-Probability   
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