Variance

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Definition

English

Variance

The variance of a random variable, probability distribution, or sample is one measure of statistical dispersion, averaging the squared distance of its possible values from the expected value (mean).

Portuguese

Variância

A variância de uma variável aleatória de uma população ou amostra é uma medida estatística de dispersão, sendo a média do quadrado da distância entre os valores possíveis e o valor esperado (média).

Reference

  • Estatística Básica (Bussab, Morettin, 2002)