Statistics & Probability
Sample Variance
Variance of a sample (n−1).
Formula
Formula
s2 = Σ (xi − x̄)2n−1
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| x̄ | sample mean | computed result | — | result |
| n | sample size | computed result | — | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givendata = 4, 8, 15, 16, 23, 42
Result182
Example 2
Givendata = 2, 4, 6
Result4