# What is the formula for estimating the standard error of variance ratio?

#### Cameron

##### New Member
When there are two independent groups, and variance ratio (VR) is:
VR = variance of group A / variance of group B
SE
VR = ?

#### staassis

##### Member
The sample variance ratio divided by the true variance ratio will have F-distribution if the underlying data are Gaussian. Use that.

Dear staassis,