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740105
bio website statisticalanalysisconsulting…
location New York, NY
age 55
visits member for 4 years, 1 month
seen 3 hours ago

I'm a statistical consultant to graduate students and researchers in fields including the behavioral and health sciences. I've assisted with review of articles, and with preparation of grants, dissertations and papers.


Sep
12
answered why is there a huge difference existed in coefficient of determination obtained from 10-fold cross validation?
Sep
12
comment why is there a huge difference existed in coefficient of determination obtained from 10-fold cross validation?
It certainly indicates some sort of problem, but what the problem is is impossible to determine from the limited information you provide. You should look at each model, but particularly the one with the very low value, and see what is going on.
Sep
11
awarded  Good Answer
Sep
9
comment Why does SAS PROC GLIMMIX give me VERY different random slopes than glmer (lme4) for a binomial glmm
Have you checked that you are modeling the dependent variable in the same direction?
Sep
9
comment Why do we use fixed effects and controls at the same time?
I am not sure I understand. Unless you are talking about multilevel models, all the variables on the right side of the equation are treated the same. Please elaborate
Sep
9
comment How to handle variables with low correlation but high loadings in factor analysis
That solution looks reasonable to me.
Sep
9
awarded  Nice Answer
Sep
9
answered When teaching statistics, use “normal” or “Gaussian”?
Sep
8
answered How to evaluate the fit of our GLM model?
Sep
7
comment Please guide me to learn SAS
You should search SAS-L where this topic has been discussed many times. The question does not fit here.
Sep
6
answered Negative imputed values
Sep
6
reviewed Close Is there any bioinformatic databases gallery webpage like that of biocViews of bioconductor?
Sep
6
reviewed Close Validity of PCA obtained results
Sep
6
reviewed Approve suggested edit on Exercise of Hypothesis Testing
Sep
6
reviewed No Action Needed Comparing two linear regression models of different sizes
Sep
5
reviewed Close How to solve this formula in R for specific days for the whole year?
Sep
5
answered How do you interpret a significant but weak correlation?
Aug
29
comment What location parameter is modelled by robust regression?
An excellent answer as usual @Glen_b . What's your idea of the best reference for this sort of thing?
Aug
29
comment How to handle variables with low correlation but high loadings in factor analysis
To me that sounds like your original solution was the right one.
Aug
28
awarded  Great Answer