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 - 3-4 Measures of Relative Standing and Boxplots - Basic Skills and Concepts - Page 124: 7


a)$-\$ 1,449,778.$ b)-2.75 c)-2.75 d)Not usual.

Work Step by Step

a) Difference between Jobs' salary and the mean of the CEO salaries: $\$1-\$ 1,449,779=-\$ 1,449,778.$ b)$z=\frac{x-\mu}{\sigma}=\frac{\$1-\$ 1,449,779}{\$527,651}=-2.75.$ Hence Jobs' salary is 2.75 standard deviations from the mean of the CEO's salary. c)$z=\frac{x-\mu}{\sigma}=\frac{\$1-\$ 1,449,779}{\$527,651}=-2.75.$ d) The z-score of Jobs' salary is less than 2, hence it is not usual.
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