Answer
$0.937$
Work Step by Step
Using the table and part a): $P(19.4\lt x\leq 20.4)=P(x\leq 20.4)-P(x\leq19.4)\approx P(z\leq1.6)-P(z\leq-2.4)=0.9452-0.0082=0.937$
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 - Problem Solving - Page 761: 33c
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