Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 8 - Hypothesis Testing - 8-2 Basics of Hypothesis Testing - Page 391: 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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