Paul R. Yarnold
Optimal Data Analysis, LLC
The Mann-Whitney U test is a nonparametric statistical test used to compare samples of scores obtained on an ordered variable between two independent groups. In contrast to U the use of UniODA in this application explicitly maximizes model accuracy for each specific sample and hypothesis; explicitly identifies the optimal threshold for discriminating the two groups; yields findings that are invariant over monotonic transformations of the data; and expresses effect strength on an absolute scale ranging from 0 (accuracy expected for the sample and hypothesis by chance) to 100 (perfect accuracy).
odajournal.com 