Q52: Why the answer is D?

These questions refer to the following For which symptom are the ratings closest information. to the arithmetic mean for that symptom, as measured by the standard deviation of its Thirty hospital patients who had been ratings? treated for the same illness were given a new treatment in a research study. They were then asked to evaluate whether five symptoms, /, 2, P, 7, and V, were made 00000 better or worse by the new treatment compared to the old treatment. For each symptom, each patient used one of five ratings