Answer
Mean = 14
Standard Deviation = 0.4
Work Step by Step
$µ_{x̅1}$ will be the mean of population 1, which is 14.
$σ_{x̅1} = \frac{σ_{1}}{\sqrt n_{1}}$
= $\frac{4}{\sqrt 100} = 4/10 = 0.4$
Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 9 - Inferences Based on Two Samples - Exercises 9.1 - 9.29 - Learning the Mechanics - Page 423: 9.7a
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