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: 24

Answer

P=0.002, z=-1.645.

Work Step by Step

The P is the probability of the z-score being more than 2.88 is 1 minus the probability of the z-score being less than 2.2.88, hence:P=1-0.998=0.002. The critical value is the z-score belonging to 0.05 to the right, hence z=1.645.
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