See ?wilcox.test. In particular, see the details section. Margarida Júlia Rodrigues Igreja wrote: > I would like to do a MannWitney test. > Can anyone help me with the propper command? -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 452-1424 (M, W, F) fax: (917) 438-0894