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l_yampolsky
l_yampolsky
Level III

positive loglikelihoods and negative AIC's

Dec 23, 2019 10:33 AM (7222 views)

I noticed that JMP invariably reports positive LLs and negative AICs, for example "-2LL = -1406.88" or "AICc =  -1451.534". This does not make sense, does it? LL must be negative by definition; AIC can in principle be negative, but with low LLs and low number of parameters it usually is positive.

Am I missing something fundamental here?

 

Thanks!

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10 REPLIES 10
Mark_Bailey
Staff Mark_Bailey
Staff

Re: positive loglikelihoods and negative AIC's

Jun 11, 2020 01:36 PM (564 views)  |  Posted in reply to message from juneshres 06-11-2020

Please do not delete this post. This discuss is useful to other users who might have trouble finding -2L, too.