A note on Dean's overdispersion test |
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| Authors: | Zhao Yang James W. Hardin Cheryl L. Addy |
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| Affiliation: | 1. Quintiles, Inc., 6700 W 115th Street, Overland Park, KS 66211, USA;2. Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, SC 29208, USA |
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| Abstract: | This note discusses an extension to the score test statistics for overdispersion in Poisson and binomial regression models [Dean, C.B., 1992. Testing for overdispersion in Poisson and binomial regression models. J. Amer. Statist. Assoc. 87, 451–457]. Examples illustrate the application of the extended results. |
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| Keywords: | Score test Overdispersion Poisson model Exponential family Count data |
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