Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 7 - Confidence Intervals and Sample - 7-1 Confidence Intervals for the Mean When σ Is Known - Exercises 7-1 - Page 379: 7

Answer

Using Table-E of the book, we have: a. $z_{a/2}$ for the 99% confidence interval = 2.58 b. $z_{a/2}$ for the 98% confidence interval = 2.33 c. $z_{a/2}$ for the 95% confidence interval = 1.96 d. $z_{a/2}$ for the 90% confidence interval = 1.65 3. $z_{a/2}$ for the 94% confidence interval = 1.88

Work Step by Step

Given above
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.