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 107: 7


Variance:$5204.82 \ hic^2.$ Standard deviation:$72.14 \ hic$ Range:$218 \ hic$.

Work Step by Step

By using the results from before: $\mu=430.14 \ hic.$ Variance=$\frac{\sum (x-\mu)^2}{n}=\frac{(371-430.14)^2+(351-430.14)^2+...+(501-430.14)^2}{7}=5204.82 \ hic^2.$ Standard deviation=$\sqrt{variance}=\sqrt{5204.82 \ hic^2}=72.14 \ hic$ Range=maximum value-minimum value=$544 \ hic-326 \ hic=218 \ hic$.
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