Question: 8.15 A self-concept test was given to a random sample consisting of six normal subjects and three subjects under psychiatric care. Higher scores indicate more

8.15 A self-concept test was given to a random sample consisting of six normal subjects and three subjects under psychiatric care. Higher scores indicate more self-esteem. The data are as follows:

Normal: 62, 68, 78, 92, 53, 81 Psychiatric: 54, 70, 79

(a) Find a P value relevant to the alternative that psychiatric patients have lower self-esteem than normal patients.

(b) Find a confidence interval for the difference of the locations (level nearest 0.90).

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