In an experiment to treat patients with generalized anxiety disorder, the drug hydroxyzine was given to 71

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In an experiment to treat patients with "generalized anxiety disorder," the drug hydroxyzine was given to 71 patients, and 30 of them improved. A group of 70 patients were given a placebo, and 20 of them improved. Let p1 and p2 represent the probabilities of improvement using hydroxyzine and the placebo, respectively. Construct a 95% confidence interval for (p1 - p2).
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Statistics For The Life Sciences

ISBN: 9780321989581

5th Edition

Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner

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