check_symmetry function

Check distribution symmetry

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.

check_symmetry(x, ...)

Arguments

• x: Model or numeric vector
• ...: Not used.

Examples

V <- suppressWarnings(wilcox.test(mtcars$mpg))
check_symmetry(V)