David Winsemius wrote:
That is different than my understanding of AIC. I thought that the AIC
and BIC both took as input the difference in -2LL and then adjusted
those differences for the differences in number of degrees of freedom.
David! Your words make sense to me now. Sorry
In 2010-08-30, C. Peng button...@hotmail.com wrote:
What statistical measure(s) tend to be answering ALL(?) question of
practical interest?
None. All I had said was that significance testing doesn't really
answer any questions of practical interest. Unfortunately, that doesn't
mean there's
What statistical measure(s) tend to be answering ALL(?) question of practical
interest?
--
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The likelihood ratio test is more reliable when one model is nested in the
other. This true for your case.
AIC/SBC are usually used when two models are in a hiearchical structure.
Please also note that any decision made made based on AIC/SBC scores are
very subjective since no sampling
The likelihood ratio test is more reliable when one model is nested in the
other. This true for your case.
AIC/SBC are usually used when two models are in a hiearchical structure.
Please also note that any decision made
made based on AIC/SBC scores are very subjective since no sampling
My suggestion:
If compare model 1 and model 2 with model 0 respectively, the (penalized)
likelihood ratio test is valid.
IF you compare model 2 with model 3, the (penalized) likelihood ratio test
is invalid. You may want to use AIC/SBC to make a subjective decision.
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My suggestion for Teresa:
If compare model 1 and model 2 with model 0 respectively, the (penalized)
likelihood ratio test is valid.
IF you compare model 2 with model 3, the (penalized) likelihood ratio test
is invalid. You may want to use AIC/SBC to make a subjective decision.
--
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Using a p-value to make any kind of decision is questionable to begin
with, and especially unreliable in choosing covariates in regression.
Old studies, e.g. by Walls and Weeks and by Bendel and Afifi, have shown
that if predictive ability is the criterion of interest and one wishes
to use
What statistical measure(s) tend to be answering ALL(?) question of practical
interest?
--
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http://r.789695.n4.nabble.com/Re-Question-regarding-significance-of-a-covariate-in-a-coxme-survival-tp2399386p2399524.html
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Christopher David Desjardins desja004 at umn.edu writes:
Hi,
I am running a Cox Mixed Effects Hazard model using the library coxme. I
am trying to model time to onset (age_sym1) of thought problems (e.g.
hearing voices) (sym1). As I have siblings in my dataset, I have
decided to
On Aug 27, 2010, at 4:32 PM, Teresa Iglesias wrote:
Christopher David Desjardins desja004 at umn.edu writes:
Hi,
I am running a Cox Mixed Effects Hazard model using the library
coxme. I
am trying to model time to onset (age_sym1) of thought problems (e.g.
hearing voices) (sym1). As I
On Sat, Aug 28, 2010 at 8:38 PM, David Winsemius dwinsem...@comcast.netwrote:
On Aug 27, 2010, at 4:32 PM, Teresa Iglesias wrote:
Christopher David Desjardins desja004 at umn.edu writes:
Hi,
I am running a Cox Mixed Effects Hazard model using the library coxme. I
am trying to model time
Hi,
I am running a Cox Mixed Effects Hazard model using the library coxme. I
am trying to model time to onset (age_sym1) of thought problems (e.g.
hearing voices) (sym1). As I have siblings in my dataset, I have
decided to account for this by including a random effect for family
(famid). My
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