Answer
P(previous sleep stage of the epoch is Wake) = P(Wake, Non-REM) + P(Wake, REM) + P(Wake, Wake)
= 0.347 + 0.0035 + 0.1218 = 0.4723
Work Step by Step
As given in answer
Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 3 - Probability - Exercises 3.35 - 3.62 - Applying the Concepts - Basic - Page 132: 3.54d
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