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# The Beta Family

The Beta distribution is a family of continuous distributions on \[0,1] with two parameters (commonly known as $$\alpha$$ and $$\beta$$, but also $$r$$ and $$s$$).

![Credit: Wikipedia](https://1127028648-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFka3X4qx2R0yzli0Ke%2Fuploads%2FstoHFZRAEmrwjsNMj3fF%2Fimage.png?alt=media\&token=dc711390-e91c-4775-b4d0-37b8737eaa16)

Beta distributions are commonly used in situations where we want to continually update a prior distribution given new information.

* The `beta (1,1)` distribution is identical to the uniform distribution.

<http://prob140.org/textbook/content/Chapter_21/00_The_Beta_and_the_Binomial.html>