📉 Variance Calculator
Calculate the population and sample variance of a data set.
What is Variance?
Variance measures how spread out data points are from the mean. Population variance is σ² = Σ(xᵢ - μ)² / N, while sample variance uses Bessel's correction: s² = Σ(xᵢ - x̄)² / (n-1). The square root of variance gives the standard deviation, which is in the same units as the original data.
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