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An Experiment Evaluating the Effectiveness of an Intervention for Improving

Question 29

True/False

An experiment evaluating the effectiveness of an intervention for improving attitudes about something finds that the mean posttest score of the experimental group is 70, which is better than the control group’s mean posttest score of 65. The significance level is .05, and the p value is .01. The standard deviation is 5.
-The results certainly are substantively significant.

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