DAX code
Z-Score =
VAR CurrentValue = [Total Sales]
VAR Mean = CALCULATE(AVERAGE('Sales'[Amount]), ALLSELECTED('Sales'))
VAR StdDev = CALCULATE(STDEVX.P('Sales', 'Sales'[Amount]), ALLSELECTED('Sales'))
RETURN
DIVIDE(CurrentValue - Mean, StdDev)DAX Z-Score Measure
Calculates how many standard deviations a value is from the mean, for spotting outliers.
My table names
Type your table and column names once. Every measure below updates.
Notes
ALLSELECTED anchors the mean and standard deviation to the report's overall selection rather than the current row context.
Requirements
- A table with a numeric column.
Builds on these measures
How to use this measure
- In Power BI Desktop, select the table that should hold the measure and choose New measure on the ribbon.
- Paste the code, then replace the placeholder table and column names with your own. The My table names fields above do this for you.
- Run it through the DAX Formatter if you want it laid out in your team's style.
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More DAX resources
Browse all 175 measures in the Power BI DAX Measures Library, or search the library for something similar to Z-Score.