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A clinical psychologist wanted to examine the relative effectiveness of drug therapy and psychotherapy for depression...

A clinical psychologist wanted to examine the relative effectiveness of drug therapy and psychotherapy for depression patients. A sample of 20 depression patients were randomly selected and assigned to either of the two therapy methods. The data below presents the effectiveness rated by independent judges. Can we conclude that one method is better than the other at .05 significance level (non-directional)? Present assumptions and hypotheses along with decision rules to test the null hypothesis. (10 points) ** NOTE: DO NOT USE SPSS; present the process of your computation

Drug therapy Psychotherapy

4 7

8 9

5 5

7 6

6 4

9 3

8 5

6 7

7 6

8 8

Math   Statistics-And-Probability   
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Answer #1

The above testing problem is related to paired t test.

Although in excel, we can directly analyise using data analysis tool but the detailed solution is given below ---

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