Variance

By Kardi Teknomo, PhD.

Variance is an average of square deviation from the arithmetic mean.

Other name: Average square deviation

Formula:

Example:

Special for only two positive numbers and , we have Variance

Example

, , then

See also: Variance and standard deviation, Average absolute deviation, Mean and Average

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Teknomo, Kardi,Mean and Average. http:\\people.revoledu.com\kardi\ tutorial\BasicMath\Average\