Elementary Statistics (12th Edition)

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

Chapter 8 - Hypothesis Testing - 8-2 Basics of Hypothesis Testing - Basic Skills and Concepts - Page 397: 17

Answer

P=0.0228, z=1.645.

Work Step by Step

The P is the probability of the z-score being more than 2 is 1 minus the probability of the z-score being less than 2, hence:P=1-0.9772=0.0228. The critical value is the z-score belonging to 0.05, hence z=1.645.
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