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

a) Construct 90 % CI for each group and the difference between means for CESD depression two groups.

b) Can we conclude on the basis of this data that group b score higher on CESD depression than group A? Let Alpha=.01.

c) Interpret the results.