Posted by daniel on Wednesday, February 19, 2014 at 11:22am.
2. On a certain anxiety questionnaire, the population is known to have a mean of 12 and a standard deviation of 2.3. A higher score represents higher levels of anxiety. Participants in a new relaxation program complete the questionnaire after completing the program, and have a mean score of 10.2. What is the effect size of the relaxation program?

Statistics  PsyDAG, Thursday, February 20, 2014 at 1:34pm
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