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 - Page 109: 22


The variation for Brinks is less.

Work Step by Step

Coefficient of variation=$\frac{standard \ deviation}{mean}$ By using the results from before: $cv_{B}=\frac{standard \ deviation}{mean}=\frac{0.178}{1.55}=0.1148=11.48$% $cv_{nB}=\frac{standard \ deviation}{mean}=\frac{0.2214}{1.73}=0.128=12.8$% The variation for Brinks is less.
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