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A Note on Wadley's Problem with Overdispersion
Author(s) -
Morgan B. J. T.,
Smith D. M.
Publication year - 1992
Publication title -
journal of the royal statistical society: series c (applied statistics)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.205
H-Index - 72
eISSN - 1467-9876
pISSN - 0035-9254
DOI - 10.2307/2347566
Subject(s) - overdispersion , mathematics , statistics , count data , poisson distribution
SUMMARY Wadley's problem results from quantal dose–response experiments when the basic distribution is Poisson, rather than binomial. We review approaches to the problem, with particular reference to using GLIM and incorporating overdispersion. Two examples are provided, and the importance of estimating overdispersion from the fit of a saturated model is emphasized.