Check distribution symmetry — check_symmetry • performance

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.

Usage

check_symmetry(x, ...)

Arguments

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

Examples

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