Performs an F test to compare the variances of two samples, which are assumed to be normally distributed.

## Technical details

### Description

An F-test of equality of variances is used to test for the null hypothesis that two normal populations have the same variance.

### Inputs

A numeric outcome variable and a categorical variable with two groups you wish to compare.

**Outcome**The variable to analyze.**Group**Variable specifying the group that each observation comes from. Where this variable is numeric, it is automatically grouped into two approximately-equally-sized groups, using the median.

### Output

### Acknowledgements

Uses the `var.test` function from the `stats` R package.

## Method

- In Displayr: How to do an F-Test to Compare Two Variances
- In Q:
**Create > Test > Variance > F-Test to Compare Two Variances**