Answer
Rejection region = t < -2.718
Work Step by Step
df = n-1 = 12-1 = 11
$t_{α} = t_{0.01} = 2.718$
Hence Rejection region = t < -2.718
Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 8 - Inferences Based on a Single Sample - Exercises 8.57 - 8.76 - Learning the Mechanics - Page 377: 8.61d
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