ANOVA
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A clinical researcher is interested in testing the effectiveness of an anti-depressant drug. She randomly assigned 10 depressed people to a placebo condition, additional 10 depressed people to the drug condition, and additional 10 depressed people to the double-dosage condition. Prior to the experiment, all 30 people had equivalent degrees of ddepression. After a month of respective treatments, the participants filled out a depression questionnaire. The individual scores (higher scores indicating greater depression) are shown below. Conduct an appropriate statistical analysis using alpha =0.05
Placebo Drug Double dosage
69 20 45
50 51 26
54 45 11
60 25 35
55 55 15
70 45 60
59 20 45
65 6 41
40 30 55
78 33 57
*see attachment for table and figures
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Solution Summary
The solution conducts ANOVA to test the hypothesis that the treatment means are not equal.
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