Answer
5.48%
Work Step by Step
$(18.5-26.8)/5.2 = z$
$-8.3/5.2 = z$
$-1.596 = z$ (rounded to -1.6)
.0548 is the value when z = -1.6
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 3 - The Normal Distributions - Chapter 3 Exercises - Page 96: 3.34a
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