Answer
123.162 to 128.978
Work Step by Step
x - $z_{a/2}$ $\times$ $\frac{o}{\sqrt n}$ to x + $z_{a/2}$ $\times$ $\frac{o}{\sqrt n}$
126.07 - 1.645 $\times$ $\frac{15}{\sqrt 72}$ to 126.07 + 1.645 $\times$ $\frac{15}{\sqrt 72}$
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 17 - Tests of Significance: The Basics - Chapter 17 Exercises - Page 414: 17.44a
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