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Unweighted Sum of Squares Test for Proportions
Author(s) -
Copas J. B.
Publication year - 1989
Publication title -
journal of the royal statistical society: series c (applied statistics)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.205
H-Index - 72
eISSN - 1467-9876
pISSN - 0035-9254
DOI - 10.2307/2347682
Subject(s) - statistics , test (biology) , mathematics , econometrics , biology , botany
SUMMARY The x 2 test for proportions (or for independence in a 2 x m contingency table) requires that expected frequencies are not too small. An alternative to amalgamating low frequencies is to retain them but to give them less weight in the analysis. The resulting modified x 2 test is also motivated by a likelihood argument based on a random effects model for the true proportions. The test works well in an example concerning error rates in computer records.