Calculadora de Variancia Gratis
Calcule a variancia de um conjunto de dados. Meca o quanto os valores se desviam da media aritmetica.
Variance Pop
2.666667
Variance Sample4.000000
Desvio Padrão1.632993
Média6.0000
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.
- 01Mean = (4 + 8 + 6) / 3 = 6
- 02Squared differences: (4-6)² = 4, (8-6)² = 4, (6-6)² = 0
- 03Variance (population) = (4 + 4 + 0) / 3 = 2.6667
- 04Variance (sample) = (4 + 4 + 0) / 2 = 4
Perguntas Frequentes
What is variance?
Variance measures how far a set of numbers is spread out from their average value. It is the average of the squared differences from the mean.
Why do we square the differences?
Squaring removes negative signs (so deviations above and below the mean don't cancel out) and gives more weight to larger deviations.
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