---
title: "Burr"
canonical: "https://modelassist.epixanalytics.com/space/EA/26575219/Burr"
format: markdown
---
No CrystalBall function

Burr(a,b,c,d)

[Burr equations](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26576034/)

 

The Burr distribution is a right-skewed distribution bounded at *a*. *b* is a scale parameter while *c* and *d* control its shape. Burr(0,1,c,d) is a unit Burr distribution. Examples of the Burr distribution are given below:

 

![image](media://18f6687c-50a9-444e-b8fc-f9bafe18307d)

![image](media://41d8cfa1-15db-42bd-91b8-56ceb70e5daa)

![image](media://58b3a5e1-a340-4c53-978b-5f10fcc2aa3d)

### Uses

The Burr distribution has a flexible shape and controllable scale and location which makes it appealing to fit to data. It has, for example, been found to fit tree trunk diameter data for the lumber industry. It is frequently used to model insurance claim sizes, and is sometimes considered as an alternative to a [Normal distribution](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575246/) when data show slight positive skewness.

 

### Comments

A Burr(a,b,c,1) is the Loglogistic distribution.

 

 

 

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