Volunteers are given a cortisol blood test before and after learning a relaxation technique. Cortisol concentration...

Volunteers are given a cortisol blood test before and after learning a relaxation technique. Cortisol concentration is known to be positively associated with stress. Data below are cortisol concentrations before and after the relaxation training. Test to see if cortisol concentration changed as a result of the training. Use 4 steps and a = .05.

before training	after training
15	9
13	10
10	8
13	7
14	11
9	10

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orchestra answered 1 year ago

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