kSamples

K-Sample Rank Tests and their Combinations

Last update: 7 October 2023

Copyright license: GNU General Public License, version 3.0, GNU General Public License, version 2.0

Software version identifier: 1.2-9, 1.0.1, 1.0, 1.2-3, 1.2-4, 1.2-6, 1.2-7, 1.2-8, 1.2-10

Source code repository: https://github.com/cran/kSamples

Description

Compares k samples using the Anderson-Darling test, Kruskal-Wallis type tests with different rank score criteria, Steel's multiple comparison test, and the Jonckheere-Terpstra (JT) test. It computes asymptotic, simulated or (limited) exact P-values, all valid under randomization, with or without ties, or conditionally under random sampling from populations, given the observed tie pattern. Except for Steel's test and the JT test it also combines these tests across several blocks of samples. Also analyzed are 2 x t contingency tables and their blocked combinations using the Kruskal-Wallis criterion. Steel's test is inverted to provide simultaneous confidence bounds for shift parameters. A plotting function compares tail probabilitiesobtained under asymptotic approximation with those obtained via simulation or exact calculations.