STDEV.P

Applies to: Calculated column Calculated table Measure Visual calculation

Returns the standard deviation of the entire population.

Syntax

STDEV.P(<ColumnName>)

Parameters

Term	Definition
columnName	The name of an existing column using standard DAX syntax, usually fully qualified. It cannot be an expression.

Return value

A number representing the standard deviation of the entire population.

Remarks

• STDEV.P assumes that the column refers to the entire population. If your data represents a sample of the population, then compute the standard deviation by using STDEV.S.

• STDEV.P uses the following formula:

  √[∑(x - x̃)²/n]

  where x̃ is the average value of x for the entire 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.

Example

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 entire population.

= STDEV.P(InternetSales_USD[SalesAmount_USD])