Open AccessExtending nondirectional heterogeneity tests to evaluate simply ordered alternative hypotheses.
Author(s) -
William R. Rice,
Steven D. Gaines
Publication year - 1994
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.91.1.225
Subject(s) - computer science , context (archaeology) , nonparametric statistics , test (biology) , statistics , statistical hypothesis testing , parametric statistics , econometrics , mathematics , biology , paleontology
Biologists frequently use nondirectional heterogeneity tests when comparing three or more populations because a suitable directional test is unavailable or is not practical to implement. Here we describe a test, the ordered heterogeneity test, that permits testing against simply ordered alternative hypotheses in the context of almost any nondirectional test. The test has a wide range of parametric and nonparametric applications. Graphs are developed for calculating exact P values.