title: Mann-Whitney test is not just a test of medians: differences in spread can be important.
authors.affiliation: Statistics Group, Faculty of Science, University of Central Lancashire, Preston PR1 2HE. ahart@uclan.ac.uk
authors.forename: A
authors.initials: A
authors.lastname: Hart
mesh_terms: D002986:Clinical Trials as Topic; D003627:Data Interpretation, Statistical; D006801:Humans; D016247:Information Storage and Retrieval; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric