CONFIDENCE.T Function (DAX)

How does the CONFIDENCE.T function (DAX) work?

The CONFIDENCE.T function returns the value that you can use to construct the confidence interval for a population mean while using a Student’s t distribution.

CONFIDENCE.T Formula Syntax

CONFIDENCE.T(
     alpha,standard_dev,size
)

How do you use the CONFIDENCE.T function?

CONFIDENCE.T calculates the width of half the confidence interval. A value picked at random from the data set has 1-alpha probability of lying within the mean plus or minus the result of CONFIDENCE.T.

Related Blog Posts

Related Support Forum Posts

How To Get Descriptive Statistics for Multiple Columns
Measures not Calculating Sum in Matrix
In-Depth Customer Churn, New Customers & Lost Customers Examples In Power BI

Considerations when using the CONFIDENCE.T function

The CONFIDENCE.T function has 3 parameters: the Alpha which is used to compute the confidence level, the Standard_dev which is the population standard deviation for the data range, and the Sample size.

If alpha ≤ 0 or alpha ≥ 1, CONFIDENCE.T returns the #NUM! error value.

If standard_dev ≤ 0, CONFIDENCE.T returns the #NUM! error value.

If size is not an integer, it is rounded.

If size equals 1, CONFIDENCE.T returns #DIV/0! error value.

Related Video Tutorials

Formula examples using the CONFIDENCE.T function

=CONFIDENCE.T(0.05,1,50)

=CONFIDENCE.T( 0.05, 0.07, 100 )

=CONFIDENCE.T(0.05,STDEV(A2:A10),9)

Related Course Modules

Ultimate-Beginners-Guide-To-PowerBI

Center of Excellence

DOWNLOAD


Download our comprehensive DAX Formula Reference Guide as perfect companion as you learn how to use DAX formulas within Power BI.


Download DAX Formulas Reference Guide
Download DAX Formula Reference Guide
Membership