std()

atoti.array.std(
    measure: VariableMeasureConvertible,
    /,
    *,
    mode: Literal[‘sample’, ‘population’] = 'sample',
) → MeasureOperation

Return a measure equal to the standard deviation of the elements of the passed array measure.

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Parameters

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measure

The measure to get the standard deviation of.

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mode

One of the supported modes:

• The sample standard deviation, similar to Excel’s STDEV.S, is $\sqrt{\frac{\sum_{i=1}^{n} (X_i - m)^{2}}{n - 1}}$ 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 standard deviation, similar to Excel’s STDEV.P is $\sqrt{\frac{\sum_{i=1}^{n}(X_i - m)^{2}}{n}}$ 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.