Answer
.52%
Work Step by Step
$ z \lt (.6-.8)/.078$
$ z \lt -.2/.078$
$ z \lt-2.56$
.0052 is the normal value for z=-2.56
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: 3.30a
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