Lately, I have been ignoring lots of good advice. I ignored the rocket scientist who told me I write too much about that statistical software thing whatever it is and that maybe I should write about javascript or something else of interest to a broader audience. I ignored my better instincts which told me loud…
With the new SAS On-Demand for Academics, I presume there will be a lot of professors who have a teaching assistant, research assistant or intern preparing the data for examples for their classes. Or, you may be co-authoring a paper with one of your colleagues. Let’s suppose you are working on a SAS Enterprise Guide…
Once upon a time there were statisticians who thought the answer to everything was to be as precise, correct and “bleeding edge” as possible. If their analyses were precise to 12 decimal places instead of 5, of course they were better because as everyone knows , 12 is more than 5 (and statisticians knew it…
Today’s post courtesy of Captain Obvious … To do quintile matching, one must first match by quintiles. Hence, the name. Quintiles divide your data set into five equal, um, fifths. Quint is Latin (or Greek or some other random language) for five. Hence, the name. So, when I did this: PROC UNIVARIATE ; VAR prob…
Having failed recently to use BMI as a variable from a data set on school children in our example for propensity score matching, because people who fill out surveys are big, fat liars, we next went to a sample of really old people and used death as a dependent variable Try faking it on the…
We are looking for data to use as an example of propensity score matching for a couple of upcoming workshop / classes. Since the data I have used previously belonged to other people, I needed to come up with an example that could be stated in a format something like: Controlling for X, Y and…
I learned at St. Mary’s Catholic School that envy was a sin. Good thing I am going to mass on Thursday, because I am suffering from a good deal of envy lately. First there is blog envy. If you have not checked out The Berkeley Blog, I highly recommend it, starting with this post on…
I looked on my calendar and there was a reminder that a month from now I will be in Nova Scotia. I try to get in my travel to anywhere north of Santa Barbara between May and October due to a near-fatal allergy to cold weather. I’m looking forward to this trip, for a few…
I’d always found the SPSS help pretty basic, so I don’t even consider it when looking for information. However, courtesy of the UCLA Academic Computing Group, which has a bunch of the SPSS case studies on-line, I found this one on mixed models. It really is one of the most straight-forward explanations of mixed models,…
There are some things to like about Statistica. The scatter plot matrix, for one. I’d done a sentiment analysis of a data set on blog posts (not mine). For each post, I had three variables number of negative sentiments expressed in the post, number of positive sentiments expressed in the post total number of comments…