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: 16

Answer

t=-2.36

Work Step by Step

$t=\frac{\bar{x}-\mu}{\frac{s}{\sqrt n}}=\frac{7.15-8}{\frac{2.28}{\sqrt {40}}}=-2.36$
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