SEARCH

SEARCH BY CITATION

Keywords:

  • Wilcoxon rank-sum test;
  • Mann-Whitney test;
  • Trend test

Abstract

An extension of the Wilcoxon rank-sum test is developed to handle the situation in which a variable is measured for individuals in three or more (ordered) groups and a non-parametric test for trend across these groups is desired. The uses of the test are illustrated by two examples from cancer research.