Answer
Mean:
$μ_X=4$
Standard deviation:
$σ_X=1.414$
Work Step by Step
Mean:
$μ_X=np=8×0.5=4$
Standard deviation:
$σ_X=\sqrt {np(1−p)}=\sqrt {8\times0.5(1-0.5)}=\sqrt {8\times0.5\times0.5}=1.414$
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