Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 7, Problem 92H
Men have an average weight of 172 pounds with a standard deviation of 29 pounds.
a. Find the
b. If 20 men have a sum weight greater than 3500 lbs. then their total weight exceeds the safety limits for water taxis. Based on (a), is this a safety concern? Explain.
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28. (a) Under what conditions do we say that two random variables X and Y are
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(b) Demonstrate that if X and Y are independent, then it follows that E(XY) =
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Chapter 7 Solutions
Introductory Statistics
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