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Currrntly I'm doing masters thesis on migration using count model.poisson and neg.binomial have no problem but when i try zeroinflated and hurdle model some pridctor variable shows error in r software.....like computationally singular
as.matrix.fit$hessian...
So how I can fix the problem and include the variable in analysis???
Hi Spunky,

I recall you being versed in psychometric methods and was wondering if I could pick your brain over something. I can't seem to send DMs, but if you are able to , could you kindly reach out?

Best,
Dear Sir/Ma
Group C is a control group. No surgeries to the group but sampled as the other 3 groups that had different techniques of a rumenotomy procedure. Each group had 3 males and 3 females as sub group. Sampling were before surgery as PRE,then postsurgeries as 0hr, 5hrs, 24hrs,48hrs, 72hrs, weeks 1,2 and 3. How do I compare the groups. I'm using graphpad prism 5.
Assays were for Cytokines.

Thank you.
Hi..I would like to know if what statistical tool should be used to determine if there is a relationship between two variables in which measures are in likert scale from 1 to 5?
hello there, i would be very thankful if you take a look into my last post to solve my problems. I was waiting for you tho.
Thank you :)