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95. Three professors at George Washington University did an experiment to determine if economists are more selfish than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes were returned. From the business, psychology, and history classes 31% were returned. Let: R = money returned; E = economics classes; O = other classes a. Write a probability statement for the overall percent of money returned. b. Write a probability statement for the percent of money returned out of the economics classes. C. Write a probability statement for the percent of money returned out of the other classes.

95. Three professors at George Washington University did an experiment to determine if economists are more selfish than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes were returned. From the business, psychology, and history classes 31% were returned. Let: R = money returned; E = economics classes; O = other classes a. Write a probability statement for the overall percent of money returned. b. Write a probability statement for the percent of money returned out of the economics classes. C. Write a probability statement for the percent of money returned out of the other classes.

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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95. Three professors at George Washington University did an experiment to determine if economists are more selfish than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes were returned. From the business, psychology, and history classes 31% were returned. Let: R= money returned; E = economics classes; O = other classes a. Write a probability statement for the overall percent of money returned. b. Write a probability statement for the percent of money returned out of the economics classes. c. Write a probability statement for the percent of money returned out of the other classes. d. Is money being returned independent of the class? Justify your answer numerically and explain it. e. Based upon this study, do you think that economists are more selfish than other people? Explain why or why not. Include numbers to justify your answer.
Transcribed Image Text:95. Three professors at George Washington University did an experiment to determine if economists are more selfish than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes were returned. From the business, psychology, and history classes 31% were returned. Let: R= money returned; E = economics classes; O = other classes a. Write a probability statement for the overall percent of money returned. b. Write a probability statement for the percent of money returned out of the economics classes. c. Write a probability statement for the percent of money returned out of the other classes. d. Is money being returned independent of the class? Justify your answer numerically and explain it. e. Based upon this study, do you think that economists are more selfish than other people? Explain why or why not. Include numbers to justify your answer.
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