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atoti.array.var(
    measure: VariableMeasureConvertible,
    /,
    *,
    mode: Literal[‘sample’, ‘population’] = 'sample',
) → MeasureDefinition
Return a measure equal to the variance of the elements of the passed array measure.

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Parameters

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measure

The measure to get the variance of.

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mode

One of the supported modes:
  • The sample variance, similar to Excel’s VAR.S, is ∑i=1n(Xi−m)2n−1\frac{\sum_{i=1}^{n} (X_i - m)^{2}}{n - 1} where m is the sample mean and n the size of the sample. Use this mode if the data represents a sample of the population.
  • The population variance, similar to Excel’s VAR.P is ∑i=1n(Xi−m)2n\frac{\sum_{i=1}^{n}(X_i - m)^{2}}{n} where m is the mean of the Xi elements and n the size of the population. Use this mode if the data represents the entire population.