## 30 Things I Learned in 30 Years as a Statistical Consultant – Part 1 of lots

Never fear, I’m not going to post all 30 things in this post. This is a series. A LONG series. Get excited. I was invited to speak at SAS Global Forum next year and it occurred to me after thinking about it for 14.2 seconds that there are plenty of people at SAS and elsewhere…

## Another tip for becoming a better programmer

I had more than the two tips on becoming a better programmer than I gave in the last post but I had run out of margarita. Now, being replenished with tequila and fresh lime by The Invisible Developer, here are two more. He often tells me that I should refer to myself as a developer…

## 2 tips to being a better programmer, if you can’t afford SAS Global Forum

I did a random sample of presentations at SAS Global Forum today, if random is defined as of interest to me, which let’s be honest, is pretty damn random most of the time.  Tip #1 Stalk Interesting People I don’t mean in a creepy showing up at their hotel room way. If you see someone…

## PROC MIXED: More errors with repeated measures

Since the last few posts detailed errors in repeated measures with PROC GLM , I thought I should acknowledge that people seem to struggle just as much with PROC MIXED. Forgetting data needs to be multiple rows This is one of the first points of confusion for students. When you do a PROC MIXED, you…

## Errors in Repeated Measures ANOVA – let me count the ways

As I said in my last post, repeated measures ANOVA seems to be one of the procedures that confuses students the most. Let’s go through two ways to do an analysis correctly and the most common mistakes. Our first example has people given an exam three times, a pretest, a posttest and a follow up…

## Repeated measures with SAS: Common mistakes in PROC GLM

When I teach students how to use SAS to do a repeated measures Analysis of Variance, it almost seems like those crazy foreign language majors I knew in college who were learning Portuguese and Italian at the same time. I teach how to do a repeated measures ANOVA using both PROC GLM and PROC MIXED….

## SUPER BASIC INTRODUCTION TO DATA ANALYSIS

I was going to write more about reading JSON data but that will have to wait because I’m teaching a biostatistics class and I think this will be helpful to them. What’s a codebook? If you are using even a moderately complex data set, you will want a code book. At a minimum, it will…

When I was young and knew everything, I would frequently see procedures or statistics and think, “When am I ever going to use THAT?” That was my thought when I learned about this new procedure to transpose a data set. (It was new then. Keep in mind, I learned SAS when I was pregnant with…

## You can’t “exactly” tell anything with statistics

Some people believe you can say anything with statistics. I don’t believe that is true, unless you flat out lie, but if you are a big fat liar, I am sure you would lie just as much without statistics. However, a point was made today when Marshall and I were discussing, via email, our presentation…

## Whipping your data into shape with SAS : Part 1 for Today

I’m sure I’ve written about this before – after all, I’ve been writing this blog for 10 years – but here’s something I’ve been thinking about: Most students don’t graduate with nearly enough experience with real data. You can use government websites with de-identified data from surveys, and I do, but I teach primarily engineering…