Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 8 - Hypothesis Testing - Review - Cumulative Review Exercises - Page 429: 3

Answer

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: $E=t_{.025}\frac{s}{\sqrt{10}}$ 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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