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Researchers conducted a study to determine whether magnets are effective in treating back pain. The results...

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Statistics

Researchers conducted a study to determine whether magnets areeffective in treating back pain. The results are shown in the tablefor the treatment​ (with magnets) group and the sham​ (or placebo)group. The results are a measure of reduction in back pain. Assumethat the two samples are independent simple random samples selectedfrom normally distributed​ populations, and do not assume that thepopulation standard deviations are equal. Complete parts​ (a) and​(b) below. Use a 0.05 significance level for both parts. TreatmentSham mu mu 1 mu 2 n 18 18 x overbar 0.55 0.45 s 0.52 1.15

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