Variance Calculator
var
command returns the variance of given values.
var 1 2 3
Result:
0.66666666666
The arguments should be separated by space or comma.
var 5, 6, 8
Result:
1.55555
What is variance?
The variance of 3, 4, 5, 6, 7 is calculated like that.
First, we should calculate the average of them. In this example, the average is 5.
Next, get the square of difference the element value and the average:
\[ (3-5)^2 = 4 \\ (4-5)^2 = 1 \\ (5-5)^2 = 0 \\ (6-5)^2 = 1 \\ (7-5)^2 = 4 \]
Finally, get the average of them and the result is the variance.
\[ \frac{ (4 + 1 + 0 + 1 + 4) }{ 2 } = 5 \]
5 is the variance of 3, 4, 5, 6, 7.