Variance

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Dictionary Says

Definition of 'Variance'

A measure of the dispersion of a set of data points around their mean value. Variance is a mathematical expectation of the average squared deviations from the mean.
Investopedia Says

Investopedia explains 'Variance'

Variance measures the variability (volatility) from an average. Volatility is a measure of risk, so this statistic can help determine the risk an investor might take on when purchasing a specific security.

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