Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

by Bluman, Allan

Published by McGraw-Hill Education

ISBN 10: 0078136334

ISBN 13: 978-0-07813-633-7

Chapter 6 - The Normal Distribution - 6-1 Normal Distribution - Exercises 6-1 - Page 324: 50

Answer

$-0.643$ and $0.643$

Work Step by Step

As the central area is 0.48, half-tail area would be $(1-0.48)/2=0.26$ which corresponds to a z value of $-0.643$, and the other z value would be $0.643$

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