# NTFDIST

Returns the f distribution for the specified parameters.

## Syntax

**NTFDIST**(

*x,**N1,**N2,**Cumulative*

)

#### Parameters

is the value for which you want the distribution ().**x**is a parameter of the distribution (Positive integer).**N1**is a parameter of the distribution (Positive integer).**N2**is a logical value that determines the form of the function. If cumulative is TRUE, NTFDIST returns the cumulative distribution function; if FALSE, it returns the probability density function.**Cumulative**

## Remarks

- Probability density function is given as:
, where is gamma function.

- Cumulative distribution function is given as:
, where and is regularized incomplete beta function.

## Example

- The example may be easier to understand if you copy it to a blank worksheet

How to copy an example- Create a blank workbook or worksheet.
- Select the example in the Help topic.
**Note**Do not select the row or column headers.Selecting an example from Help

- Press CTRL+C.
- In the worksheet, select cell A1, and press CTRL+V.
- To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the
**Tools**menu, point to**Formula Auditing**, and then click**Formula Auditing Mode**.

1 2 3 4 5 6 7 A B Data Description 5 Value for which you want the distribution 4 Value of parameter N1 30 Value of parameter N2 Formula Description (Result) =NTFDIST(A2,A3,A4,TRUE) Cumulative distribution function for the terms above =NTFDIST(A2,A3,A4,FALSE) Probability density function for the terms above - Download sample excel sheet