Graphical Procedures
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Graphical Procedures
Graphical Procedures are an essential part of statistical analysis. But graphs are often poorly done, and there are some lesser known graphical methods that can be highly effective for displaying data. To name just a few of these: mosaic plots, dot plots, strip plots, lattice plots, density plots, quantile plots and various enhancements of the familiar scatterplot.
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Whenever you run a SAS program, you should look at the log file. In fact, I have set up keys on my SAS...

In this article I showed some problems with the average or arithmetic mean and in this one I discussed...

I introduced this series the other day. Next up in the list is "getting help". In both SAS and R, there are...

Question: Does the butterfly effect imply that correlation implies causation? My answer: No. The butterfly...

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

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

I will be giving a 4 hour course at SESUG in Savannah this fall. The course is titled: Lies, damn lies...

Often, when reading a statistics book, you will see some variation on the phrase "independent data". Many...

I attended the 2015 meeting of the Southeast SAS Users' Group in Savannah, Georgia from September 27  29....

Lately, across the statistical blogosphere, the repeating discussion of R vs. SAS has started up again. In...

Randomized controlled trials (RCTs) are generally regarded as the gold standard in assessing treatments. There...

This is a paper for NESUG (NorthEast SAS Users' Group) 2010, which you can see as a PDF articleNESUG2010.