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National Development & Research Institutes
Sam Friedman National Development & Research Institutes 71 West 23d Street, 8th floor New York, NY 10010 1 212 845 4467 friedman@ndri.org
Peter Flom is a terrific person to work with on statistics. He has helped me to write several grant proposals to NIHwhich got funded!
Peter has also helped me and my colleagues prepare analyses for papers and in writing up the results. Peter is a very good writer and editorwhich can prove invaluable as well.
On a personal note, Peter is also a lot of fun to work with.
Featured Posts

People often transform their variables. There are two sorts of transformation: One is to simply multiply all...

In regression and ANOVA, an interaction occurs when the effect of one independent variable on the...

This is a talk developed by David Cassell and me, and given at NESUG and SGF and WUSS

Question: What is principal component analysis in superlayman terms? My answer: Principal component...

In a previous post, I dealt with some SAS code for scatterplots. Various problems can arise when using...

Part of the default output from PROC LOGISTIC is a table that has entries including`percent concordant' and...

On this site I have written quite a lot about regression analysis.
But what is...

What is the mean? The average, or mean, or, more formally, the arithmetic mean, is one of the simplest...

Question: How can any stochastic phenomenon follow a continuous distribution, since the probability of...

When you have bivariate data  that is, data on two variables  either or both may be categorical or...

BMI, or body mass index, is calculated by dividing by weight by height squared. Specifically, it's weight in...

Question: Does lack of correlation imply lack of causation? Answer: We all know that correlation does not...