I’m the world’s biggest hypocrite when it comes to documentation. In every staff meeting, I emphasize documenting whatever code you have written that week, but I always put off doing it myself. My excuse is always that it isn’t final and when I get the complete project done I will put it in the wiki….
So far, we have looked at How to get the sample demographics and descriptive statistics for your dependent and independent variable. Computing descriptive statistics by category Now it’s time to dive into step 3, computing inferential statistics. The code is quite simple. We need a LIBNAME statement. It will look something like this. The exact…
In the last post, I posed the following null hypothesis as an example: There is no difference in obesity among Caucasians, African-Americans and Latinos. You can see the results from the statistical analyses here. Since my question only pertains to those three groups, let’s begin by creating a data set with just those subjects. libname…
I finally am getting around to something in SAS Studio that I think is really cool – the tasks. Although they don’t look identical to SAS Enterprise Guide just because the screen layout is a little different, these are really, really similar to the tasks you would see in EG. If you are using this…
It has been pretty well established that I am the worst soccer mom in the history of soccer moms. Most of the games I miss because I am somewhere else. My children have told me that my autobiography should be entitled, “I was out of town at the time” because most of the stories of…
Getting ready to teach biostatistics in a few weeks and it seems to me that the real confusion in most cases is not the calculations, which can be fairly simple, but rather that there can be several ways of looking at the same question. Let’s take “risk” as an example. What is the “risk” of…
In case you don’t know, SAS On-Demand is the FREE , as in free beer, offering of SAS for academic use. How good is it? There really can’t be one answer to that. First of all, there are multiple options – SAS Studio, SAS Enterprise Miner, SAS Enterprise Guide, JMP, etc. so some may be…
You’d think the ultimate example of simplicity in measurement would be mortality rate. Count up the dead people – they aren’t hard to catch. Divide by the total number of people you had when you started. Done. It’s not super complicated but it is slightly more complicated than that. First of all, how do you…
SAS Enterprise Miner – Free, on a Mac – Bet You Didn’t See That Coming … but how the hell do you get your data on it? I wanted to test SAS Text Miner and was surprised to find the university did not have a license. No problem – and it really was, astoundingly, no…
I’m about to tear my hair out. I’ve been reading this statistics textbook which shall remain nameless, ostensibly a book for graduate students in computer science, engineering and similar subjects. The presumption is that at the end of the course students will be able to compute and interpret a factor analysis, MANOVA and other multivariate…