Compute residual standard error of linear models.

## Value

Numeric, the residual standard error of `model`

.

## Details

The residual standard error is the square root of the residual
sum of squares divided by the residual degrees of freedom.

## Examples

```
data(mtcars)
m <- lm(mpg ~ hp + gear, data = mtcars)
performance_rse(m)
#> [1] 3.107785
```