[R] overdispersion and quasibinomial model

[djpren]

I am looking for the correct commands to do the following things:

1. I have a binomial logistic regression model and i want to test for
overdispersion.
2. If I do indeed have overdispersion i need to then run a quasi-binomial
model, but I'm not sure of the command.
3. I can get the residuals of the model, but i need to then apply a shapiro
wilk test to test them. Does anyone know the command for this?

Any help would be hugely appreciated,

Thanks,

Djp


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