Find the approximate value of r for the sample

Reference no: EM131008047

Pain tolerance study. A study published in Psychosomatic Medicine (March/April 2001) explored the relationship between reported severity of pain and actual pain tolerance in 337 patients who suffer from chronic pain. Each patient reported his/her severity of chronic pain on a 7-point scale (1 = no pain, 7 = extreme pain). To obtain a pain tolerance level, a tourniquet was applied to the arm of each patient and twisted. The maximum pain level tolerated was measured on a quantitative scale.

(a) According to the researchers, ‘‘correlational analysis revealed a small but signi?cant inverse relationship between [actual] pain tolerance and the reported severity of chronic pain.'' Based on this statement, is the value of r for the 337 patients positive or negative?

(b) Suppose that the result reported in part a is signi?cant at α = .05. Find the approximate value of r for the sample of 337 patients. [Hint:
Use the formula t = r√(n - 2)//(1 - r2).]

FEEDING TRIAL 1	DIET Plants	WEIGHT CHANGE (%) -6	DIGESTION EFFICIENCY (%) 0	ACID-DETERGENT FIBER (%) 28.5
2	Plants	-5	2.5	27.5
3	Plants	-4.5	5	27.5
4	Plants	0	0	32.5
5	Plants	2	0	32
38	Duck Chow	9	59	8.5
39	Duck Chow	12	52.5	8
40	Duck Chow	8.5	75	6
41	Duck Chow	10.5	72.5	6.5
42	Duck Chow	14	69	7

Reference no: EM131008047

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