Answer
$\approx0.9487$
Work Step by Step
$z=\frac{\overline{x}-\mu}{\sigma/\sqrt n}=\frac{0.3-0}{1/\sqrt{10}}\approx0.9487$
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 - Apply Your Knowledge - Page 403: 17.13a
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