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andra
2004 Mar 16
2
glm questions
...calculate the "usual model
Chi-squared" statistic
-2[lnL(null) - lnL(fitted)].
But, just for curiosity's sake, what't the saturated model's -2lnL ?
2. Why no 'scaled deviance' in output? Or, how are you supposed to tell
if there is over-dispersion?
I just checked andSAS gives us the scaled and nonscaled deviance.
I have read the Venables & Ripley (MASS 4ed) chapter on GLM . I believe
I understand the cautionary point about overdispersion toward the end
(p. 408). Since I'm comparing lots of other books at the moment, I
believe I see people using the...