Variance Calculator
Calculate Variance
Formula
σ² = Σ(xᵢ - μ)² / N, s² = Σ(xᵢ - x̄)² / (n - 1)
Frequently Asked Questions
What is the difference between population and sample variance?
Population variance (σ²) divides the sum of squared deviations by N (the entire population size). Sample variance (s²) divides by N-1 (Bessel's correction) to provide an unbiased estimate of the population variance from a sample.
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