Variance
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
To give you better understanding on the computation of variance, you may want to try with your own input data using the interactive Variance program below. To use the program, simply type your input data (only numbers input are accepted) in the box below, separated by comma. Then click "Get Variance" button.