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Divergence-based tests of homogeneity for spatial data

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Hobza, Tomáš and Morales, Domingo and Pardo Llorente, Leandro (2014) Divergence-based tests of homogeneity for spatial data. Statistical Papers, 55 . pp. 1059-1077. ISSN 1613-9798

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Official URL: http://link.springer.com/article/10.1007%2Fs00362-013-0554-6



Abstract

The problem of testing homogeneity in contingency tables when the data are spatially correlated is considered. We derive statistics defined as divergences between unrestricted and restricted estimated joint cell probabilities and we show that they are asymptotically distributed as linear combinations of chi-square random variables under the null hypothesis of homogeneity. Monte Carlo simulation experiments are carried out to investigate the behavior of the new divergence test statistics and to make comparisons with the statistics that do not take into account the spatial correlation. We show that some of the introduced divergence test statistics have a significantly better behavior than the classical chi-square test for the problem under consideration when we compare them on the basis of the simulated sizes and powers.


Item Type:Article
Uncontrolled Keywords:Test of homogeneity; Divergence statistics; Chi-square statistic; Spatial data
Subjects:Sciences > Mathematics > Mathematical statistics
ID Code:28158
Deposited On:10 Feb 2015 09:27
Last Modified:10 Feb 2015 09:27

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