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

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 5 - Discrete Probability Distributions - Review Exercises - Section 5-3 - Page 305: 17


$\mu=120$ $\sigma^2=24$ $\sigma=4.9$

Work Step by Step

We have $p=0.8$ and $n=150$ mean=$\mu=np=120$ variance=$\sigma^2=np(1-p)=24$ standard deviation=$\sigma=\sqrt {np(1-p)}=4.9$
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