Based on the confidence interval in b), can it be concluded that the therapy is effective?
QUESTION 4
The depression scores of 25 patients were recorded before and after they had undergone therapy. The scores were analyzed to see the effectiveness of the therapy. The outputs are indicated below.
Assuming the score of depression is normally distributed.
a) Find the values of X and Y.
b) State the 95% confidence interval for the mean depression scores.
c) Based on the confidence interval in b), can it be concluded that the therapy is effective?
