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Review Question - QID 220330

Bias QID: 220330 (M2.OMB.1)
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QID 220330 (Type "220330" in App Search)
A researcher is performing a study to determine whether taking an herbal supplement is effective in treating patients with irritable bowel syndrome. She designs a randomized and blinded study where patients are given an unlabeled container containing either the supplement or a similar placebo powder. Patients are then asked to track their symptoms over the next year using the form shown in Figure A. The percentag...
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