DAX Function Guide

STDEV.P
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Sam McKay

CEO & Founder

How does the STDEV.P work?
The STDEV.P function (DAX) returns the standard deviation of the entire population.
STDEV.P Formula Syntax

STDEV.P(
     <ColumnName>
)

How do you use the STDEV.P?

This function is used to calculates the standard deviation for a sample set of data. The STDEV.P calculates standard deviation using the “n” method, ignoring logical values and text.

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Considerations when using the STDEV.P?
  1. 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.
  2. STDEV.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
  3. Blank rows are filtered out from columnName and not considered in the calculations.
  4. An error is returned if columnName contains less than 2 non-blank rows
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Formula examples using the STDEV.P

=STDEV.P(InternetSales_USD[SalesAmount_USD])

=STDEV.P(A3:A12)

=STDEV.P(C5:C16,E5:E16,G5:G16)

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