﻿ BETA.DIST function

# BETA.DIST function

Returns the beta distribution.

The beta distribution is commonly used to study variation in the percentage of something across samples, such as the fraction of the day people spend watching television.

## Syntax

BETA.DIST(x,alpha,beta,cumulative,[A],[B])

The BETA.DIST function syntax has the following arguments:

• X     Required. The value between A and B at which to evaluate the function

• Alpha     Required. A parameter of the distribution.

• Beta     Required. A parameter of the distribution.

• Cumulative      Required. A logical value that determines the form of the function. If cumulative is TRUE, BETA.DIST returns the cumulative distribution function; if FALSE, it returns the probability density function.

• A     Optional. A lower bound to the interval of x.

• B     Optional. An upper bound to the interval of x.

## Remarks

• If any argument is nonnumeric, BETA.DIST returns the #VALUE! error value.

• If alpha ≤ 0 or beta ≤ 0, BETA.DIST returns the #NUM! error value.

• If x < A, x > B, or A = B, BETA.DIST returns the #NUM! error value.

• If you omit values for A and B, BETA.DIST uses the standard cumulative beta distribution, so that A = 0 and B = 1

## Example

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

How do I copy an example?

Important   Do not select the row or column headers.

Selecting an example from Help

2. Press CTRL+C.

3. In Excel, create a blank workbook or worksheet.

4. In the worksheet, select cell A1, and press CTRL+V.

Important   For the example to work properly, you must paste it into cell A1 of the worksheet.

5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

After you copy the example to a blank worksheet, you can adapt it to suit your needs.

 1 2 3 4 5 6 7 8 9
 A B Data Description 2 Value at which to evaluate the function 8 Parameter of the distribution 10 Parameter of the distribution 1 Lower bound 3 Upper bound Formula Description (Result) =BETA.DIST(A2,A3,A4,TRUE,A5,A6) Cumulative beta probability density function, for the above parameters (0.68547058) =BETA.DIST(A2,A3,A4,FALSE,A5,A6 Beta probability density function, for the above parameters (1.48376465)

Applies To: Excel 2010, Excel Starter, Excel Online, SharePoint Online

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