[R] quasibinomial glm

[Stephane Dray]

Hello list,
i have a glm with family=binomial, link=logit but there is 
over-dispersion. So, in order to take into account for this problem i 
choose to do a glm with family=quasibinomial(). I'm not an expert on 
this subject and i ask if someone could validate my approach (i'm not 
sure for the tests) :
quasi_glm(myformula,quasibinomial(),start=mystart)
summary(quasi) # test t for coefficients
anova(quasi,test="F") # F test (quasi glm) instead of Chisq test 
(classical glm)

Thanks in advance.
-- 
Stéphane DRAY
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Biométrie et Biologie évolutive - Equipe "Écologie Statistique"
Universite Lyon 1 - Bat 711 - 69622 Villeurbanne CEDEX - France

Tel : 04 72 43 27 56			   Fax : 04 78 89 27 19
       04 72 43 27 57 	   E-mail : dray at biomserv.univ-lyon1.fr 
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ADE-4               http://pbil.univ-lyon1.fr/ADE-4/ADE-4F.html
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