Answer
.2060
Work Step by Step
Using a z-table, we find:
P(X >18) = P(X = 18) + P(X = 19) + P(X = 20) = .1369 + .0576 + .0115 = .2060
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 14 - Binomial Distributions - Chapter 14 Exercises - Page 343: 14.38b
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