Answer
$97.5\%$
Work Step by Step
$\frac{25-33}{4}=-2$ . The normal distribution is symmetric about the mean; thus using the 68-95-99.7 rule and the graph we get: $P(\overline{x}-2\sigma\leq x)=13.5\%+34\%+34\%+13.5\%+2.35\%+0.15\%=97.5\%$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
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 - 11.3 Exercises - Skill Practice - Page 760: 14
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