STDEVX.P Function (DAX)
How does the STDEVX.P function (DAX) work?
The STDEVX.P function (DAX) returns the standard deviation of the entire population.
STDEVX.P Formula Syntax
STDEVX.P(
<table>, <expression
)
How do you use the STDEVX.P function?
This function is used to estimate standard deviation based on the entire population that results from evaluating an expression for each row of a table.
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Considerations when using the STDEVX.P function
- 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 populationand 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 DAX function may return different results when used in a model that is deployed and then queried in DirectQuery mode.
Related Video Tutorials
Formula examples using the STDEVX.P function
=STDEVX.P(RELATEDTABLE(InternetSales_USD), InternetSales_USD[UnitPrice_USD] – (InternetSales_USD[DiscountAmount_USD]/InternetSales_USD[OrderQuantity]))
= STDEVX.P (Sales,[Sales Amount])
