Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0-32191-121-0
ISBN 13: 978-0-32191-121-6

Chapter 5 - Normal Probability Distributions - Review Exercises - Page 287: 41

Answer

$z = 1.04$

Work Step by Step

0.85 is not in the table so we find the corresponding z score of the area that is closest to it. 0.8508 is the closest figure to 0.850 so we use its corresponding z-score value of 1.04. If convenient technology can also be used to give a z score value of approximately 1.0364.
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