Answer
The claim is that S.D is not equal to 5. Since it contains a strict inequality, the null hypothesis is:
$H_{o}: σ = 0$
$H_{a}: σ \ne 0$
Work Step by Step
As given above
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 7.1 Introduction to Hypothesis Testing - Exercises - Page 359: 13
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