Perform some exploratory analysis on the DTS study described above.

(a) Compute the mean and standard deviation of the HamD scores for the two treatment groups at each time point.

(b) Treat repeated outcomes in HamD scores as if they were independent and fit the linear model with treatment and measurement time (as a continuous variable) as well as their interaction as the predictors. Is DCM, compared with CAU, more effective in treating depression?

(c) Treatment stigma (TS) scores take values \(0-3\), with higher scores indicating more negative stigma. Compute the proportions of each level of TS scores for the two treatment groups at each time point.

(d) Treat repeated outcomes in TS scores as if they were independent and fit a cumulative logistic model with treatment and assessment time (as a continuous variable) as well as their interaction as the predictors. Is DCM, compared with CAU, more effective in treating stigma associated with depression treatment?