A standard drug is known to be effective in 80% of the cases in which it is

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A standard drug is known to be effective in 80% of the cases in which it is used. A new drug is tested on 100 patients and found to be effective in 85 cases. Is the new drug superior? (Evaluate the probability of observing 85 or more successes assuming that the new and old drugs are equally effective.)
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Statistical Inference

ISBN: 978-0534243128

2nd edition

Authors: George Casella, Roger L. Berger

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