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Statistics review 10: Further nonparametric methods

Viv Bewick1*, Liz Cheek2 and Jonathan Ball3

Author Affiliations

1 Senior Lecturer, School of Computing, Mathematical and Information Sciences, University of Brighton, Brighton, UK

2 Senior Lecturer, School of Computing, Mathematical and Information Sciences, University of Brighton, Brighton, UK

3 Senior Registrar in ICU, Liverpool Hospital, Sydney, Australia

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Critical Care 2004, 8:196-199 doi:10.1186/cc2857

Published: 16 April 2004

Abstract

This review introduces nonparametric methods for testing differences between more than two groups or treatments. Three of the more common tests are described in detail, together with multiple comparison procedures for identifying specific differences between pairs of groups.

Keywords:
Friedman test; Jonckheere–Terpstra test; Kruskal–Wallis test; least significant difference