Answer
$p(z\geq0)=.5$
Work Step by Step
$z=0$ is the middle point under the standard normal curve whose area is 1. Hence $p(z\geq0=.5)$
Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 5 - Continuous Random Variables - Exercises 5.20 - 5.52 - Learning the Mechanics - Page 241: 5.26e
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