Teaching assistant record the amount of time

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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

PowerPointWithout

Microsoft

PowerPoint 13, 15, 10, 12, 6, 18, 9, 14, 8, 11, 4, 5, 7, 19, 21, 23

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.

Reference no: EM132850247

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