Elementary Statistics (12th Edition)

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

Chapter 3 - Statistics for Describing, Exploring, and Comparing Data - 3-3 Measures of Variation - Basic Skills and Concepts: 42

Answer

a)68% b) 99.7%

Work Step by Step

a) By the empirical rule, 68% of the data are within 1 standard deviation of the mean, hence the answer is 68%. b) $|96.34-98.2|=|100.06-98.2|=1.86=3 \ standard \ deviation$, hence by the empirical rule, 99.7% of the data are within 3 standard deviations from the mean, hence the answer is 99.7%.
Small 1513330048
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.