8th Edition

ISBN: 9781337558075

Author: Charles Henry Brase, Corrinne Pellillo Brase

Publisher: Cengage Learning

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Textbook Question

Chapter 5.1, Problem 19P

Psychology: Creativity When do creative people get their best ideas? USA Today did a survey of 966 inventors (who hold U.S. patents) and obtained the following information:

Time of Day When Best Ideas Occur

Time	Number of Inventors
6 A.M. – 12 noon	290
12 noon-6 P.M.	135
6 P.M. – 12 midnight	319
12 midnight-6 A.M.	222

Assuming that the time interval includes the left limit and all the times up to but not including the right limit, estimate the probability that an inventor has a best idea during each time interval: from 6 A.M. to 12 noon, from 12 noon to 6 P.M., from 6 P.M. to 12 midnight, from 12 midnight to 6 A.M.

Do the probabilities of part (a) add up to 1? Why should they? What is the sample space in this problem?

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Chapter 5 Solutions

Understanding Basic Statistics

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Solution Summary: The author explains how the relative frequency formula can be used to find the desired probabilities.

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Chapter 5 Solutions