Elementary Statistics (12th Edition)

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

Chapter 6 - Normal Probability Distributions - 6-2 The Standard Normal Distribution - Basic Skills and Concepts - Page 258: 47


About 99.73% of the area is between $z=-3$ and $z=3$.

Work Step by Step

These steps are for a TI-83/84 calculator. 1. Press "2nd" "VARS" to get to the DISTR menu. 2. Select "normalcdf" 3. Enter the z-scores, which are $z=-3$ and $z=3$, as $(-3,3)$. 4. Press "enter" Your result should be $0.9973$. This correlates to 99.73%, which means that 99.73% of the area is within 3 standard deviations of the mean.
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.