Answer
$9$
$7.92$
$2.81$
Work Step by Step
mean $\mu=np=75\times0.12=9$
variance $\sigma^2=npq=9\times0.88=7.92$
standard deviation $\sigma=\sqrt {\sigma}=2.81$
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: 24
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