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Unformatted text preview: y 53 11 12 Psychotherap y 63 12 13 Psychotherap y 66 In this study, 12 subjects were randomly assigned into three groups: control group where subjects were treated with medicine; placebo group where subjects were only treated with placebo; and the psychotherapy group where subjects were only treated with psychotherapy. Form a multivariate linear regression model to predict a persons pain by using the group id and her/his age as predicting variable. Write down the mathematical model and clearly explain each component in your regression model....
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 Spring '11
 Qiu

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