Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 8 - Hypothesis Testing - 8-2 Basics of Hypothesis Testing - Basic Skills and Concepts - Page 397: 9

Answer

There is not sufficient evidence agains the claim that 20% of adults smoke.

Work Step by Step

The sample proportion of 20% is really close to the expected 20% and is likely to happen. Hence there is not sufficient evidence agains the claim that 20% of adults smoke.
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