Kruskal-Wallis and Power Analysis in R: Analysing Flight Delays

Comparing groups using the Kruskal-Wallis test

Source: Image by Author — implementation in R using RStudio

The Kruskal-Wallis test is a non-parametric test that tests the null hypothesis that k sampled number of groups possess the same distribution function.

The test is performed by means of a ranking mechanism, whereby the observations across the samples are…