Answer
$P(20\leq X\leq30)=0.25$
Work Step by Step
It is the area of the shaded region:
$A=(30-20)0.025=0.25$
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 7 - Review - Test - Page 396: 11b
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