Statistics
Statistics
4th Edition
ISBN: 9780393929720
Author: David Freedman, Robert Pisani, Roger Purves
Publisher: Norton, W. W. & Company, Inc.
Question
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Chapter 27.3, Problem 4EC

a.

To determine

Explain whether the difference in averages is statically significant.

Also provide the conclusion.

b.

To determine

Explain the reason of changing the average from one study to another.

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