zero-one-inflated beta

Zero One Inflated Beta Models for Proportion Data

March 16th, 2016 by

Proportion and percentage data are tricky to analyze.

Much like count data, they look like they should work in a linear model.

They’re numerical.  They’re often continuous.

And sometimes they do work.  Some proportion data do look normally distributed so estimates and p-values are reasonable.

But more often they don’t. So estimates and p-values are a mess.  Luckily, there are other options. (more…)