variance formula code example

Example 1: variance

Var(X) = E(X^2) - (E(X))^2

The mean of the squares subtracted by the square of the mean.

Example 2: range of variance in statistics

o to infinity

Example 3: omogeneity of variance

The assumption of homogeneity of variance is an assumption of the independent samples t-test and ANOVA 
stating that all comparison groups have the same variance.