A researcher conducts an independent-measures study examining the effectiveness of a group exercise program at an assisted living facility for elderly adults. One group of residents is selected to participate in the program, and a second group serves as a control. After 6 weeks, the researcher assessed the physical fitness of each participant. The data are as follows:
Exercise Group: Control Group:
n = 15 n = 10
M = 15.5 M = 12
SS = 190 SS = 120.5
A. Does the exercise program have a significant effect on physical fitness? Use p < .05, 2-tails test.
B. Compute estimated Cohen’s d to measure the size of the treatment effect. Is this a large effect?
C. Write a conclusion demonstrating how the outcome of the hypothesis test would appear in an APA style research report.
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