A likelihood ratio test for equality of deviations from randomness

Autor:	Dan L. Johnson, A. J. Petkau
Rok vydání:	1995
Předmět:	Score test education.field_of_study Population Negative binomial distribution Poisson distribution Measure (mathematics) symbols.namesake Likelihood-ratio test Statistics symbols education Ecology Evolution Behavior and Systematics Randomness Statistical hypothesis testing Mathematics
Zdroj:	Population Ecology. 37:203-209
ISSN:	1438-390X 1438-3896
DOI:	10.1007/bf02515821
Popis:	The use of the sample variance-to-mean ratio as a measure of deviation from randomness in spatial pattern is reviewed. The likelihood ratio method of constructing a statistical test for the equality of several population variance-to-mean ratios is described, and details are provided for the special case where counts are modelled as arising from a negative binomial distribution. This test is illustrated by application to example data sets in ecology. Likelihood ratio tests represent a general methodology whereby relationships among several indices of aggregation can be systematically investigated, provided one is able to specify a suitable parametric form for the underlying distributions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::af27757f7080f8db75da3c321d6e5d6c https://doi.org/10.1007/bf02515821 Zobrazit plný text záznamu Full text from SpringerLink