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: 20


$\mu=135$ $\sigma^2=98.55$ $\sigma=9.93$

Work Step by Step

Given $p=0.27, n=500$, mean=$\mu=np=135$ variance=$\sigma^2=np(1-p)=98.55$ standard deviation=$\sigma=\sqrt {98.55}=9.93$
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