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Variance Tests for Species Association
Author(s) -
McCulloch Charles E.
Publication year - 1985
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1938030
Subject(s) - association (psychology) , variance (accounting) , table (database) , ecology , sample (material) , statistics , statistical hypothesis testing , biology , computer science , mathematics , data mining , psychology , chemistry , accounting , chromatography , business , psychotherapist
Schulter recently discussed species association tests for handling situations where the data consist of a two—way table (species by samples) of either presence/absence or density data. In this paper, connections between those association tests and standard statistical tests are established and used as a guide to proper interpretation of the association tests. Association tests are sensitive to purely sample—to—sample differences and in some cases will not reflect species interactions at all. However, in cases where the association tests are appropriate, the connections furnish information on the choice of accurate critical values.