On Rao score and PearsonX
2 statistics in generalized linear models |
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Authors: | Gianfranco Lovison |
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Institution: | (1) Dipartimento di Scienze Statistiche e Matematiche “S. Vianelli”, Viale delle Scienze, 90128 Palermo, Italy |
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Abstract: | The identity of the Rao score and PearsonX
2 statistics is well known in the areas where the latter was first introduced: goodness-of-fit in contingency tables and binary
responses. We show in this paper that the same identity holds when the two statistics are used for testing goodness-of-fit
of Generalized Linear Models. We also highlight the connections that exist between the two statistics when they are used for
the comparison of nested models. Finally, we discuss some merits of these unifying results.
Work financially supported by cofin. MIUR grants 2000 and 2002. |
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Keywords: | Goodness-of-fit Regression Models Equivalence of Test Statistics Rao Score test PearsonX 2 Generalized Linear Models |
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