Answer
Fail to reject $H_{o}$ at α = 0.01
Work Step by Step
$z = \frac{x̄ - μ}{σ/\sqrt n}$
$z = \frac{23500-22500}{1200/\sqrt 45}$
= 5.59
P(z \leq 5.59) = 1 > α
Hence fail to reject $H_{o}$ at α = 0.01
Elementary Statistics: Picturing the World (6th Edition)
by Larson, Ron; Farber, Betsy
Published by
Pearson
ISBN 10:
0321911210
ISBN 13:
978-0-32191-121-6
Chapter 7 - Hypothesis Testing with One Sample - Section 7.2 Hypothesis Testing for the Mean - Exercises - Page 374: 30
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