Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 11 Data Analysis and Statistics/ - 11.1 Find Measures of Central Tendency and Dispersion - Guided Practice for Example 1 - Page 745: 1


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Work Step by Step

The mean of $n$ numbers is the sum of the numbers divided by $n$. The median of $n$ is the middle number of the numbers when they are in order (and the mean of the middle $2$ numbers if $n$ is even). The mode of $n$ numbers is the number or numbers that appear(s) most frequently. Hence here the mean: $\frac{2+3+4+6+7+8+8+9+12+15}{10}=7.4$. The median is the average of the middle two in the sequence $2,3,4,6,7,8,8,9,12,15$, which is: $(7+8)/2=7.5$. The median is 7.5.
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