# Sample Variance

By Levi Clancy for Student Reader on *updated *

- Parent
- Siblings

###### Computational formula for sample variance

σ^{2} = [ Σ ( X^{2} ) - ( Σ X )^{2} ] / [ n - 1 ]

###### Definitional formula for sample variance

σ^{2} = [ Σ ( X - ~~X~~^{2} ) ] / [ n - 1 ]

// ~~ tag should be overline~~