Answer
See the picture.
Work Step by Step
$E(X)=N\times P(x)$
N = 200 8-foot grade A 2-by-4s
$E(0)=200\times0.6703=134.06$
$E(1)=200\times0.2681=53.62$
$E(2)=200\times0.05363=10.73$
$E(3)=200\times0.007150=1.43$
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 6 - Section 6.3 - Assess Your Understanding - Applying the Concepts - Page 352: 20b
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