Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 8 - Hypothesis Testing - Review - Cumulative Review Exercises - Page 435: 3


$42.1$ words to $64.5$ words

Work Step by Step

We need to find the margin of error. We know the following equation for the margin of error: $E=t_{0.025}\frac{s}{\sqrt{10}}$, where $s$ is the standard deviation. Using a standard deviation calculator to find $s$, we find that the error is $11.2$. Thus, the values can range from $11.2$ below the mean ($42.1$) to $11.2$ above the mean ($64.5$).
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