STDEVX.P is a DAX function that estimates the standard deviation based on the entire population from evaluating an expression for each row in a table.
STDEVX.P(
Table,
Expression
)| Argument | Properties | Description |
|---|---|---|
| Table | The table containing the rows for which the expression will be evaluated. | |
| Expression | The expression to be evaluated for each row of the table. |
A number that represents the standard deviation of the entire population.
STDEVX.P evaluates expression for each row of table and returns the standard deviation of expression assuming that table refers to the entire population. If the data in table represents a sample of the population, you should compute the standard deviation by using STDEVX.S instead.
STDEVX.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.
The following example shows the formula for a calculated column that calculates the standard deviation of the unit price per product, when the formula is used in the Product table.
= STDEVX.P(RELATEDTABLE(InternetSales_USD), InternetSales_USD[UnitPrice_USD] – (InternetSales_USD[DiscountAmount_USD]/InternetSales_USD[OrderQuantity]))
Other functions related to STDEVX.P are:
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