Tag: Cat Truxillo

The Human Side of Statistical Process Control: Three Applications of SAS/QC You Might Not Have Thought About

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. …

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…

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…