Question: A researcher uses a repeated measures study to evaluate the effectiveness of magnetic therapy for treating chronic pain. A sample of n = 9 patients is obtained, each who has been treated for severe elbow pain for at least 1 year. Each patient is given a questionnaire to evaluate current level of pain. The patients are then instructed to wear a magnetic band around their elbows for 2 weeks. After the 2- week period, the patients again complete the questionnaire evaluating the pain. For this sample, the reported level of pain decreased by an average of Msigma = 12.5 points with the SS=1152. Do these data indicate a significant change in the level of pain ? Use a two tailed test with an alpha of .01.

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