Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 3 - Section 3.4 - Use of Standard Deviation - Exercises - Page 107: 3.63

Answer

a. 99.7% b. 68% c. 95%

Work Step by Step

By Empirical rule, when k =1, the minimum percentage will be 68% By Empirical rule, when k =2, the minimum percentage will be 95% By Empirical rule, when k =3, the minimum percentage will be 99.7% A 34-8k = 10 K=3, minimum percentage = 99.7% B 34-8k = 26 K=1, minimum percentage = 68% C 34-8k = 18, k=2, minimum percentage =95%
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