Perfect cells,direct models and contingency table outliers |
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| Authors: | Graham J.G. Upton Montsenat Guillen |
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| Affiliation: | 1. Department of Mathematics , Univeisity of Essex , Colchester, UK;2. Department of Mathematics , University of Barcelona , Spain |
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| Abstract: | A peifect cell frequency is one exactly satisfying a given model General formulae foi peifect cells are provided for direct models having two Or hiee components. Foimulae are piovided for the on-diagonal cells of the corresponding hat matrices Methods for identifying outliers are discussed. |
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| Keywords: | direct models hat matrices influence leverage outliers perfect cells |
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