Mann–Whitney U test

a nonparametric test of centrality for ordinal data that contrasts scores from two independent samples to assess whether there are significant differences between the two sets of rankings. The statistic obtained from this test, U, is calculated by summing the number of ranks in one group that are smaller than each of the ranks in the other group. A Mann–Whitney U test is analogous to a one-way analysis of variance, except that the former is conducted with ranked data and the latter is conducted with continuous data. See also Wilcoxon–Mann–Whitney test. [Henry Berthold Mann (1905–2000), Austrian-born U.S. mathematician; Donald Ransom Whitney (1915–2001), U.S. statistician]

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

March 16th 2025

phantom

1. an illusion without material substance.

2. the feeling that an amputated body part (e.g., a limb or breast) is still present. See breast-phantom phenomenon; phantom limb; pseudoesthesia.