Exact Methods in the NPAR1WAY Procedure
Anupama Narayanan and Donna Watts, SUGI Proceedings, 1996
The NPAR1WAY procedure computes exact p-values for the simple linear rank statistics based on Wilcoxon scores, median scores, Van der Waerden scores, and Savage scores. Exact p-values are computed for these statistics when the data are classified into two levels (two-sample tests), and when the data are classified into more than two levels (multi-sample tests). For the two-sample case, the simple linear rank statistics listed above correspond to the Wilcoxon-Mann-Whitney, Median, Van der Waerden, and Savage tests, respectively. For the multi-sample case, the NPAR1WAY procedure gives exact p-values for the Kruskal-Wallis, Brown-Mood, k-sample Van der Waerden, and k-sample Savage tests.