Answer
The sample size is large enough to use the normal approximation
Work Step by Step
$np_{o}$ = 500 x .05 = 25
Hence the sample size is large enough to use the normal approximation
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 8.77 - 8.96 - Learning the Mechanics - Page 384: 8.79a
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