# T.INV

Returns the left-tailed inverse of the Student's t-distribution.

## Syntax

T.INV(Probability,Deg_freedom)


### Parameters

Term Definition
Probability The probability associated with the Student's t-distribution.
Deg_freedom The number of degrees of freedom with which to characterize the distribution.

## Return value

The left-tailed inverse of the Student's t-distribution.

## Remarks

This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.

## Example

EVALUATE { T.INV(0.75, 2) }


Returns

[Value]
0.816496580927726