Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 95H
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. 4.1% 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; 0 other classes
a. Write a
b. 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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Introductory Statistics
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