Arithmetic mean
Revision as of 13:36, 18 June 2006 by MCrawford (talk | contribs) (Arithmetic Mean moved to Arithmetic mean: There's no need to capitalize "mean")
Arithmetic Mean
The arithmetic mean of a set of numbers (or variables) is the sum of all the numbers, divided by the number of numbers. If we let 
denote Arithmetic Mean, 
is the arithmetic mean of the 
numbers 
.
(Umm how can you center an equation (\[ \])?)
For example, if I wanted to find the average of the numbers 3, 1, 4, 1, and 5, I would compute: 
. Arithmetic means are also called averages. Arithmetic means show up frequently in contest problems.
