Answer
$μ_{x̄} = 27$
$σ_{x̄} = 1.549$
Work Step by Step
We have μ = 27, σ = 6 and n= 15
$μ_{x̄} = μ$, hence $μ_{x̄} = 27$
$σ_{x̄} = σ / \sqrt n$
$= 6 / \sqrt 15$
= 1.549
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