# FInv - script and chart function

FInv() returns the inverse of the F-probability distribution.

Syntax:

FInv(prob, degrees\_freedom1, degrees\_freedom2)

Return data type: number

Arguments:

FINV arguments

| Argument | Description |
| --- | --- |
| prob | A probability associated<br>with the F-probability distribution and must be a number between 0 and 1. |
| degrees\_freedom | An integer stating the number of degrees of freedom. |

This function is related to the FDist function in the following way:   
`If prob = FDist(value, df1, df2), 
 then FInv(prob, df1, df2) = value`

Limitations:

All arguments must be numeric, else NULL will be returned.

Examples and results:

Examples and results

| Example | Result |
| --- | --- |
| FInv( 0.0019369, 8, 6) | Returns 15.0000 |

## Learn more

* [FDist - script and chart function](https://help.qlik.com/en-US/qlikview/September2025/Subsystems/Client/Content/QV_QlikView/Scripting/StatisticalDistributionFunctions/FDist.htm)