Next, calculate the deviations from the mean:
Suppose we have a dataset of exam scores: Sxx Variance Formula
Sxx = 0 + 100 + 100 + 25 + 25 = 250
If we have a sample of 5 students, the sample variance would be: Next, calculate the deviations from the mean: Suppose
Sxx = Σ(xi - x̄)²
| Student | Score | | --- | --- | | 1 | 80 | | 2 | 70 | | 3 | 90 | | 4 | 85 | | 5 | 75 | and μ represents the population mean.
where E denotes the expected value, and μ represents the population mean.