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 Cohen's d effect size statistic is +1.0.
Correct Answer:

Verified
Correct Answer:
Verified
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