Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment​ (with magnets) group and the sham​ (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed​populations,

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment​ (with magnets) group and the sham​ (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed​populations, and do not assume that the population standard deviations are equal.

 

a. The test​ statistic, t, is (Round to two decimal places as​ needed.)

b. The​ P-value is  ​(Round to three decimal places as​ needed.)
 
c.  Construct a confidence interval suitable for testing the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment.
 
less thanmu 1 minus mu 2less than0.783
​(Round to three decimal places as​ needed.)
Treatment
Sham
H2
In
13
13
0.55
0.41
0.75
1.02
Transcribed Image Text:Treatment Sham H2 In 13 13 0.55 0.41 0.75 1.02
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