Answer
(a)
Work Step by Step
When we calculate $P$, we assume that the null hypothesis is true. Also, the $P$-value is the probability of obtaining a value that is more extreme or equal to the standardized test statistic. Thus the answer is (a).
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 17 - Tests of Significance: The Basics - Check Your Skills - Page 411: 17.21
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