Changes: Arithmetic mean

Revision as of 18:30, 4 March 2009

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The arithmetic mean or arithmetic average of a list of numbers is the sum of the numbers divided by the list's length.

$\overline{x}=\frac1n\cdot\sum_{k=1}^n x_k$

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 The '''arithmetic mean''' or '''arithmetic average''' of a list of numbers is the [[addition|sum]] of the numbers [[division|divided]] by the list's length.
-<math>\overline{x} = \frac{\sum_{k=1}^n x_k}{n}</math>
+<math>\overline{x} = \frac{1}{n}\cdot \sum_{k=1}^n x_k</math>
 ==See also==