Answer
x̄ is normally distributed with a mean of 0.75 and standard deviation of 0.0007
Work Step by Step
We have μ = 0.75, σ = .004 and n= 30
$μ_{x̄} = μ$, hence $μ_{x̄} = 0.75$
$σ_{x̄} = σ / \sqrt n$
$= .004 / \sqrt 30$
= 0.0007
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 8 - Review - Review Exercises - Page 422: 6a
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