To compare the effectiveness of four drugs in relieving postoperative pain, an experiment was done by randomly
Question:
(a) Make a 4 × 2 contingency table showing the counts of patients who were free of pain and those who had pain, and test the null hypothesis that all four drugs are equally effective. (Use a = .05.)
(b) Let p1, p2, p3, and p4 denote the population proportions of patients who would be free of pain under the use of drugs 1, 2, 3, and 4, respectively. Calculate a 90% confidence interval for each of these probabilities individually.
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Related Book For
Statistics Principles And Methods
ISBN: 9780470904114
7th Edition
Authors: Richard A. Johnson, Gouri K. Bhattacharyya
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