| To: | mtexeira@agro.uba.ar |
|---|---|
| Subject: | Re: overdispersion in logistic regression |
| From: | Sundar Dorai-Raj <sundar.dorai-raj@pdf.com> |
| Date: | Mon, 11 Jul 2005 13:13:12 -0500 |
| Cc: | s-news@lists.biostat.wustl.edu |
| In-reply-to: | <1121105272.42d2b5783d0a6@webmail3.agro.uba.ar> |
| Organization: | PDF Solutions, Inc. |
| References: | <1121105272.42d2b5783d0a6@webmail3.agro.uba.ar> |
| User-agent: | Mozilla Thunderbird 1.0.2 (Windows/20050317) |
mtexeira@agro.uba.ar wrote: Hi:Everybody knows how can I correct for overdispersion in a logistic regression problem ?thanks Marcos Texeira
Use the quasi family:
fit <- glm(Kyphosis ~ 1, quasi("logit", "mu(1-mu)"), kyphosis)
summary(fit)
HTH,
--sundar
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