Elementary Statistics (12th Edition)

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

Chapter 3 - Statistics for Describing, Exploring, and Comparing Data - 3-4 Measures of Relative Standing and Boxplots - Basic Skills and Concepts - Page 125: 11


The magnitudes are 0.084 and 2.396.

Work Step by Step

If a value is unusual, then it is more than two standard deviations far from the mean. $Minimum \ usual \ value=mean-2\cdot(standard \ deviation)=1.24-2\cdot0.578=0.084.$ $Maximum \ usual \ value=mean+2\cdot(standard \ deviation)=1.24+2\cdot0.578=2.396.$ Therefore the magnitudes are 0.084 and 2.396.
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