MS Excel - Excel BETA.DIST() function
The beta distribution (BETA.DIST() function is used to study variation in the percentage of something across samples, such as the fraction of the day people spend watching football matches in television.
Version : Excel 2013
Syntax
BETA.DIST(x,alpha,beta,cumulative,[A],[B])
Parameters
| Name | Description | Data Category | Required/ Optional |
|---|---|---|---|
| X | The value between A and B at which to evaluate the function | number | Required |
| Alpha | A parameter of the distribution. | number | Required |
| Beta | A parameter of the distribution. | number | Required |
| Cumulative | 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. |
boolean | Required |
| A | A lower bound to the interval of x. | number | Optional |
| B | An upper bound to the interval of x. | number | Optional |
Return Values :
- 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 - 1 : Excel BETA.DIST() function
In the following worksheet BETA.DIST returns the cumulative distribution function (cumulative is TRUE) for the data present in sample data column in the table.
| Sample Data | Description |
|---|---|
| 3 | Value at which to evaluate the function |
| 7 | Parameter of the distribution |
| 9 | Parameter of the distribution |
| 2 | Lower bound |
| 4 | Upper bound |
Example - 2 :
In the following example BETA.DIST returns the probability density function (cumulative is FALSE) for the above sample data :
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Source:http://www.w3resource.com/excel/excel-beta.dist-function.php
