Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 11 Data Analysis and Statistics - 11.3 Use Normal Distributions - Guided Practice for Examples 1 and 2 - Page 758: 3



Work Step by Step

The normal distribution is symmetric about the mean; thus using the 68-95-99.7 rule we get: $P(\overline{x}\leq x\leq\overline{x}+2\sigma)=34\%+13.5\%=47.5\%$
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