[R] Chi square value of anova(binomialglmnull, binomglmmod, test="Chisq")

[David Winsemius]

On Jun 5, 2012, at 4:52 AM, lincoln wrote:

> Thank you for your commentaries and suggestions.
>
> Site 0 and site 1 are interpretable like events.
> In fact these data come from a simultaneous observations of  
> individuals in
> two different sites (so they are independent observations: while one
> individual is observed in one site it can't be in another).
>
> Each individual is assigned to age "0" (first year of age), or  
> "1" (all the
> rest); even though it may seem a very strong (brutal?) pooling, from a
> biological point of view it makes sense given these two classes of
> individuals are quite homogeneous in their dispersal behavior within  
> each
> age class (0 or 1). The goal of this analysis is just to  
> characterize their
> dispersal behavior (which individuals stay home at site 0 and which  
> ones
> disperse to site 1?

This is making me think you really have multiple observation on the  
same individuals (and that persons make transitions from one state to  
another as a result of the passage of time. That needs a more complex  
analysis than "simple" logistic regression. You might consider posting  
a more complete description of the study on the SIG Mixed Effects  
mailing list.

-- 
David.

>
> About the "birth" issue, here I am more in doubt. "Birth" relates to  
> the
> month of birth (5= May, 6= June, 7= July). It seems to me too it is  
> a quite
> severe pooling (one individual born 1st June is 5 as one individual  
> born
> 30th June but one individual born 30th May or 1st July is 4 or 6 - it
> doesn't make much sense). Anyway I didn't find a way to better  
> measure this
> variable as there is no a real starting and ending point, more or less
> individuals may born since 1st May up to 31th July (I mean in my  
> data set
> there are no individuals born before and after these dates).
>
> Any hint?
>
>
> --
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>
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David Winsemius, MD
West Hartford, CT