# Beta Prime > Beta prime distribution.
## Usage ```javascript var betaprime = require( '@stdlib/stats/base/dists/betaprime' ); ``` #### betaprime Beta prime distribution. ```javascript var dist = betaprime; // returns {...} ``` The namespace contains the following distribution functions:
- [`cdf( x, alpha, beta )`][@stdlib/stats/base/dists/betaprime/cdf]: beta prime distribution cumulative distribution function. - [`logcdf( x, alpha, beta )`][@stdlib/stats/base/dists/betaprime/logcdf]: evaluate the natural logarithm of the cumulative distribution function for a beta prime distribution . - [`logpdf( x, alpha, beta )`][@stdlib/stats/base/dists/betaprime/logpdf]: beta prime distribution logarithm of probability density function (PDF). - [`pdf( x, alpha, beta )`][@stdlib/stats/base/dists/betaprime/pdf]: beta prime distribution probability density function (PDF). - [`quantile( p, alpha, beta )`][@stdlib/stats/base/dists/betaprime/quantile]: beta prime distribution quantile function.
The namespace contains the following functions for calculating distribution properties:
- [`kurtosis( alpha, beta )`][@stdlib/stats/base/dists/betaprime/kurtosis]: beta prime distribution excess kurtosis. - [`mean( alpha, beta )`][@stdlib/stats/base/dists/betaprime/mean]: beta prime distribution expected value. - [`mode( alpha, beta )`][@stdlib/stats/base/dists/betaprime/mode]: beta prime distribution mode. - [`skewness( alpha, beta )`][@stdlib/stats/base/dists/betaprime/skewness]: beta prime distribution skewness. - [`stdev( alpha, beta )`][@stdlib/stats/base/dists/betaprime/stdev]: beta prime distribution standard deviation. - [`variance( alpha, beta )`][@stdlib/stats/base/dists/betaprime/variance]: beta prime distribution variance.
The namespace contains a constructor function for creating a [betaprime][betaprime-distribution] distribution object.
- [`BetaPrime( [alpha, beta] )`][@stdlib/stats/base/dists/betaprime/ctor]: beta prime distribution constructor.
```javascript var BetaPrime = require( '@stdlib/stats/base/dists/betaprime' ).BetaPrime; var dist = new BetaPrime( 2.0, 4.0 ); var mu = dist.mean; // returns ~0.667 ```
## Examples ```javascript var objectKeys = require( '@stdlib/utils/keys' ); var betaprime = require( '@stdlib/stats/base/dists/betaprime' ); console.log( objectKeys( betaprime ) ); ```