Wr. Rice et Sd. Gaines, EXTENDING NONDIRECTIONAL HETEROGENEITY TESTS TO EVALUATE SIMPLY ORDERED ALTERNATIVE HYPOTHESES, Proceedings of the National Academy of Sciences of the United Statesof America, 91(1), 1994, pp. 225-226
Biologists frequently use nondirectional heterogeneity tests when comp
aring 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 nondirecti
onal test. The test has a wide range of parametric and nonparametric a
pplications. Graphs are developed for calculating exact P values.