A professor has a teaching assistant record the amount of time (in minutes) that
ID: 3364001 • Letter: A
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.
With Microsoft
PowerPoint
Without
Microsoft
PowerPoint
7
10
12
9
8
19
23
18
5
21
4
15
14
13
11
6
Use the normal approximation for the Mann-Whitney U test to analyze the data above. (Round your answer to two decimal places.)
z =
State whether to retain or reject the null hypothesis. (Assume alpha equal to 0.05.)
Retain the null hypothesis. Reject the null hypothesis.
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
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.