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

Question

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.

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

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

Explanation / Answer

The U-value is 20. The critical value of U at p < .05 is 13. Therefore, the result is not significant at p < .05.

The Z-Score is -1.20774. The p-value is .22628. The result is not significant at p < .05.

We retain the null hypothesis

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