Answer
6
Work Step by Step
We know:
n = 20, p = 0.3
Thus, we obtain:
µ = np = 20 x 0.3 = 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 14 - Binomial Distributions - Apply Your Knowledge - Page 335: 14.8a
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