STDEV.S is a DAX function that estimates the standard deviation based on a sample, ignoring logical values and text in the sample.
STDEV.S( ColumnName )| Argument | Properties | Description |
|---|---|---|
| ColumnName | A column that contains numbers corresponding to a sample of a population. |
A number that represents the standard deviation of a sample population.
STDEV.S assumes that the column refers to a sample of the population. If your data represents the entire population, then compute the standard deviation by using STDEV.P.
STDEV.S uses the following formula:
√[∑(x – x̃)2/(n-1)]
where x̃ is the average value of x for the sample population and n is the population size.
Blank rows are filtered out from columnName and not considered in the calculations.
An error is returned if columnName contains less than 2 non-blank rows.
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.
The following example shows the formula for a measure that calculates the standard deviation of the column, SalesAmount_USD, when the table InternetSales_USD is the sample population.
= STDEV.S(InternetSales_USD[SalesAmount_USD])
Other functions related to STDEV.S are:
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