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Social experiment, Part II. Exercise 6.23 introduces a

OpenIntro Statistics | 3rd Edition | ISBN: 9781943450039 | Authors: David M Diez; Christopher D Barr; Mine Çetinkaya-Rundel ISBN: 9781943450039 86

Solution for problem 6.55 Chapter 6

OpenIntro Statistics | 3rd Edition

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OpenIntro Statistics | 3rd Edition | ISBN: 9781943450039 | Authors: David M Diez; Christopher D Barr; Mine Çetinkaya-Rundel

OpenIntro Statistics | 3rd Edition

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Problem 6.55

Social experiment, Part II. Exercise 6.23 introduces a social experiment conducted by a TV program that questioned what people do when they see a very obviously bruised woman getting picked on by her boyfriend. On two dierent occasions at the same restaurant, the same couple was depicted. In one scenario the woman was dressed provocatively and in the other scenario the woman was dressed conservatively. The table below shows how many restaurant diners were present under each scenario, and whether or not they intervened. Scenario Provocative Conservative Total Intervene Yes 5 15 20 No 15 10 25 Total 20 25 45 A simulation was conducted to test if people react dierently under the two scenarios. 10,000 simulated dierences were generated to construct the null distribution shown. The value ppr,sim represents the proportion of diners who intervened in the simulation for the provocatively dressed woman, and pcon,sim is the proportion for the conservatively dressed woman. p ^ pr_sim p ^ con_sim 0.4 0.2 0.0 0.2 0.4 0 0.1 0.2 (a) What are the hypotheses? For the purposes of this exercise, you may assume that each observed person at the restaurant behaved independently, though we would want to evaluate this assumption more rigorously if we were reporting these results. (b) Calculate the observed dierence between the rates of intervention under the provocative and conservative scenarios: ppr pcon. (c) Estimate the p-value using the figure above and determine the conclusion of the hypothesis test.

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Exam 1: Study Guide Lecture 2: Rafia Chaudhary  Statistics is the art and science of learning from data  Individuals (also known as subjects, instances, and observations) are the things we get our data from. Who/what do we get our data from o These are often people, animals, or other living things but don’t need to be  Variable: any characteristic or piece of information about an individual o Is an answer to a question, like how tall are you What’s your name etc.  Ex: you are working for a drug company and you are developing a new drug to treat the common cold o Individuals: humans o Variables: measure of patient’s symptoms, time it takes f

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Chapter 6, Problem 6.55 is Solved
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Textbook: OpenIntro Statistics
Edition: 3
Author: David M Diez; Christopher D Barr; Mine Çetinkaya-Rundel
ISBN: 9781943450039

The full step-by-step solution to problem: 6.55 from chapter: 6 was answered by , our top Statistics solution expert on 09/09/17, 04:01AM. This textbook survival guide was created for the textbook: OpenIntro Statistics, edition: 3. OpenIntro Statistics was written by and is associated to the ISBN: 9781943450039. Since the solution to 6.55 from 6 chapter was answered, more than 557 students have viewed the full step-by-step answer. This full solution covers the following key subjects: . This expansive textbook survival guide covers 8 chapters, and 376 solutions. The answer to “Social experiment, Part II. Exercise 6.23 introduces a social experiment conducted by a TV program that questioned what people do when they see a very obviously bruised woman getting picked on by her boyfriend. On two dierent occasions at the same restaurant, the same couple was depicted. In one scenario the woman was dressed provocatively and in the other scenario the woman was dressed conservatively. The table below shows how many restaurant diners were present under each scenario, and whether or not they intervened. Scenario Provocative Conservative Total Intervene Yes 5 15 20 No 15 10 25 Total 20 25 45 A simulation was conducted to test if people react dierently under the two scenarios. 10,000 simulated dierences were generated to construct the null distribution shown. The value ppr,sim represents the proportion of diners who intervened in the simulation for the provocatively dressed woman, and pcon,sim is the proportion for the conservatively dressed woman. p ^ pr_sim p ^ con_sim 0.4 0.2 0.0 0.2 0.4 0 0.1 0.2 (a) What are the hypotheses? For the purposes of this exercise, you may assume that each observed person at the restaurant behaved independently, though we would want to evaluate this assumption more rigorously if we were reporting these results. (b) Calculate the observed dierence between the rates of intervention under the provocative and conservative scenarios: ppr pcon. (c) Estimate the p-value using the figure above and determine the conclusion of the hypothesis test.” is broken down into a number of easy to follow steps, and 241 words.

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Social experiment, Part II. Exercise 6.23 introduces a