When you think of statistical process control, or SPC for short, what industry first comes to your mind? In the past 10 or 15 years, diverse industries have begun to standardize processes and administrative tasks with statistical process control. …
Tag: Cat Truxillo
Who Ate My Lunch? Discriminant Thresholds to Reduce False Accusations
Lunch. For some workers, it’s the sweetest part of an otherwise bitter day at the grindstone. Nothing can turn that sweetness sour like going into the breakroom to discover that someone has taken your lunch and eaten it themselves.
Nothing lik…
The Punchline: MANOVA or a Mixed Model?
So, if you were reading last week, we talked about how to structure your data for a mixed models repeated measures analysis. And as my friend Rick pointed out, there’s more than one way to go about restructuring your data (if you ask real nice, …
Data Structure for Repeated Measures Analysis… A Teaser
Next week’s blog entry will build on this one, so I want you to take notes, OK?
It’s not headline news that in most cases, the best way to handle a repeated measures analysis is with a mixed models approach, especially for Normal reponses (for o…
Discrimanant Analysis, Priors, and Fairy-Selection
A student in my multivariate class last month asked a question about prior probability specifications in discriminant function analysis:
What if I don’t know what the probabilities are in my population? Is it best to just use the default in PROC D…
We Wanted to Call It "All the Statistics You Missed in B-School"
Happy New Year!! This is a good time to think about what was going on here in SAS Education one year ago, and to introduce you to a big project that I’m really excited to “take public.”
In January 2010 (as well as throughout 2009), we kept getti…
Quantum Football, Electron Preschoolers, and Schrodinger’s STEM
At this time of year as fans debate over the best players in college football, quantum mechanics combines with college sports to produce the Heisman uncertainty principal: you cannot know who has won the trophy until it is announced, and so you ha…
Weekday Morning Quick-trick: How to Score from PROC VARCLUS
Have you used multivariate procedures in SAS and wanted to save out scores? Some procedures, such as FACTOR, CANDISC, CANCORR, PRINCOMP, and others have an OUT= option to save scores to the input data set. However, to score a new data set, or to p…