The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 18 - Inference in Practice - Chapter 18 Exercises - Page 438: 18.52c

Answer

P = 0.0062

Work Step by Step

The z value is: z = $\frac{x-u}{o/\sqrt n}$ = $\frac{0 - 0.5}{1/\sqrt 25}$ = -2.5 P = P(Z < -2.5) = 0.0062
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