Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 12 - Analysis of Variance - 12-2 One-Way ANOVA - Basic Skills and Concepts - Page 611: 2

Answer

See below.

Work Step by Step

If you combine the results of the three tests, then the combined confidence level will be less than the separate confidence level and hence the confidence in the conclusion will be less than the states'.
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