Uses Hotelling and Solomons test of symmetry by testing if the standardized
nonparametric skew (\(\frac{(Mean - Median)}{SD}\)) is different than 0.

This is an underlying assumption of Wilcoxon signed-rank test.

## Examples

```
V <- suppressWarnings(wilcox.test(mtcars$mpg))
check_symmetry(V)
#> OK: Data appears symmetrical (p = 0.119).
#>
```