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It is well known that a placebo, a fake medication ortreatment, can sometimes have a

Probability and Statistics for Engineering and the Sciences | 9th Edition | ISBN: 9781305251809 | Authors: Jay L. Devore ISBN: 9781305251809 122

Solution for problem 51 Chapter 9.4

Probability and Statistics for Engineering and the Sciences | 9th Edition

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Probability and Statistics for Engineering and the Sciences | 9th Edition | ISBN: 9781305251809 | Authors: Jay L. Devore

Probability and Statistics for Engineering and the Sciences | 9th Edition

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Problem 51

It is well known that a placebo, a fake medication ortreatment, can sometimes have a positive effect justbecause patients often expect the medication or treatmentto be helpful. The article Beware the NoceboEffect (New York Times, Aug. 12, 2012) gave examplesof a less familiar phenomenon, the tendency for patientsinformed of possible side effects to actually experiencethose side effects. The article cited a study reported inThe Journal of Sexual Medicine in which a group ofpatients diagnosed with benign prostatic hyperplasia wasrandomly divided into two subgroups. One subgroup ofsize 55 received a compound of proven efficacy alongwith counseling that a potential side effect of the treatmentwas erectile dysfunction. The other subgroup ofsize 52 was given the same treatment without counseling.The percentage of the no-counseling subgroup thatreported one or more sexual side effects was 15.3%,whereas 43.6% of the counseling subgroup reported atleast one sexual side effect. State and test the appropriatehypotheses at significance level .05 to decide whether thenocebo effect is operating here. [Note: The estimatedexpected number of successes in the no-counselingsample is a bit shy of 10, but not by enough to be of greatconcern (some sources use a less conservative cutoff of5rather than 10).]

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Chapter 9.4, Problem 51 is Solved
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Textbook: Probability and Statistics for Engineering and the Sciences
Edition: 9
Author: Jay L. Devore
ISBN: 9781305251809

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It is well known that a placebo, a fake medication ortreatment, can sometimes have a