Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 8 - Hypothesis Testing - 8-2 Basics of Hypothesis Testing - Page 391: 16

Answer

t=-2.36

Work Step by Step

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

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.