Two sided test for null hypothesis

Reference no: EM1314091

Study was performed to compare effectiveness of applied relaxation method and applied relaxation method with biofedd back in patients with chronic low back pain (stron, cramond and mass 1989)20 female patients were arbitrarily allocated to each treatment group, and treatments were then given. One of dependent variable studied was change in pain rating index-based on the Mcgill pain survey between pre and post treatment. Patients were also followed for longer period but those results are not used in this exercise. Actual change data were not given in article but following table comprises hypothetical changes for two groups.

Relaxation Only	Relaxation with biofeedback
10	9
11	12
21	7
18	14
16	4
16	2
15	11
9	8
2	9
19	11
5	6
18	10
16	9
14	7
12	8
13	10
11	6
13	13
14	7
20	8

Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level. Given the rational for your choice of either the one sided or two sided test.

Reference no: EM1314091

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