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Outliers and patterns of outliers in contingency tables with algebraic statistics

  • Fabio Rapallo

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we provide a definition of pattern of outliers in contingency tables within a model-based framework. In particular, we make use of log-linear models and exact goodness-of-fit tests to specify the notions of outlier and pattern of outliers. The language and some techniques from Algebraic Statistics are essential tools to make the definition clear and easily applicable. We also analyse several numerical examples to show how to use our definitions.

Original languageEnglish
Pages (from-to)784-797
Number of pages14
JournalScandinavian Journal of Statistics
Volume39
Issue number4
DOIs
Publication statusPublished - Dec 2012
Externally publishedYes

Keywords

  • Algebraic statistics
  • Goodness-of-fit tests
  • Log-linear models
  • Toric models

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