Answer
Mean:
$μ_X=6$
Standard deviation:
$σ_X=1.223$
Work Step by Step
Mean:
$μ_X=np=8\times0.75=6$
Standard deviation:
$σ_X=\sqrt {np(1-p)}=\sqrt {8\times0.75(1-0.75)}=\sqrt {8\times0.75\times0.25}=1.223$
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 6 - Review - Review Exercises - Page 356: 8b
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