Question: The CESD depression subscales scores by subjects in the two groups as follow:

Group A: 21, 22, 21, 21, 18, 14, 16, 10, 20, 26, 20, 13, 15, 11,7

Group B: 14, 17, 20, 15, 20, 10, 9, 7, 8, 5, 10, 12, 4, 6

1. Construct 90 % CI for each group and the difference between means for CESD depression two groups.
2. Can we conclude on the basis of this data that group b score higher on CESD depression than group A? Let Alpha=.01.
3. Interpret the results.

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