Answer
Mean $240$
Variance $48$
Standard deviation $6.93$
Work Step by Step
Mean $\mu=np=300\times0.8=240$
Variance $\sigma^2=npq=240\times0.2=48$
Standard deviation $\sigma=\sqrt {\sigma}=6.93$
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 5 - Discrete Probability Distributions - Chapter Quiz - Page 307: 23
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