Calculadora de Variancia — Formula

How to Calculate Variance

Formula (Population Variance)

σ² = Σ(xᵢ - μ)² / N

Steps

1. Find the mean (μ) 2. Subtract the mean from each value 3. Square each difference 4. Find the average of the squared differences

Variance is the square of the standard deviation.

Exemplo Resolvido

Find the variance of 4, 8, and 6.

  1. Mean = (4 + 8 + 6) / 3 = 6
  2. Squared differences: (4-6)² = 4, (8-6)² = 4, (6-6)² = 0
  3. Variance (population) = (4 + 4 + 0) / 3 = 2.6667
  4. Variance (sample) = (4 + 4 + 0) / 2 = 4