Hi friends, Wilcoxon's Matched-Pairs Signed-Ranks test obviously yields a Z-value. Do you know whether that is a Z-value which can be found in standard Z-tables? Does the sign have the same meaning as with the usual Z-value? Regards - Jim. -- . . . . . . . . . . . . . . . . . . . . . . Jim Groeneveld, MSc. Biostatistician Science Team Vitatron B.V. Meander 1051 6825 MJ Arnhem P.O.Box 5227 6802 EE Arnhem Tel: +31/0 26 376 7365 Fax: +31/0 26 376 7305 [log in to unmask] www.vitatron.com My computer multi-boots OS's, each of them adapting the DST twice a year [common disclaimer]