atoti.array.var module

atoti.array.var(measure, *, mode='sample')

Return a measure equal to the variance of the elements of the passed array measure.

Parameters

• measure (MeasureDescription) – The measure to get the variance of.

• mode (Literal[‘sample’, ‘population’]) –

  One of the supported modes:

  • The sample variance, similar to Excel’s VAR.S, is \(\frac{\sum_{i=0}^{n} (X_i - m)^{2}}{n - 1}\) 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 \(\frac{\sum_{i=0}^{n}(X_i - m)^{2}}{n}\) 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.

Return type

MeasureDescription