Answer
$μ_{x̄} = 30$
$σ_{x̄} = 2.530$
Work Step by Step
We have n= 10, μ = 30 and σ = 8
$μ_{x̄} = μ$, hence $μ_{x̄} = 30$
$σ_{x̄} = σ / \sqrt n$
$= 8 / \sqrt 10$
= 2.530
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