Sxx Variance Formula May 2026

s² = (1/(n-1)) * Σ(xi - x̄)²

| Student | Score | | --- | --- | | 1 | 80 | | 2 | 70 | | 3 | 90 | | 4 | 85 | | 5 | 75 | Sxx Variance Formula

Let's consider an example to illustrate the calculation of Sxx: s² = (1/(n-1)) * Σ(xi - x̄)² |

| Student | Score | Deviation from mean | Squared deviation | | --- | --- | --- | --- | | 1 | 80 | 0 | 0 | | 2 | 70 | -10 | 100 | | 3 | 90 | 10 | 100 | | 4 | 85 | 5 | 25 | | 5 | 75 | -5 | 25 | the sample variance would be:

Sxx = Σ(xi - x̄)²

Sxx = Σ(xi - x̄)²

If we have a sample of 5 students, the sample variance would be: