# error structure GLM

Discussion in 'SP8' started by indexo, Jun 28, 2020.

1. ### indexoVery Active Member

Hi,

Does error structure of a GLM model essentially mean the variance function (i.e. variance should be proportional to)?

2. ### padasalaVery Active Member

Your question is a little ambiguous.

The error structure effectively depends on the distribution of the underlying data and is often used to check if the link function used is adequate. If you use the right link function, the errors should be randomly distributed

The variance function basically determines how the variance is related to the mean

Katherine Young likes this.