Search Results for: scree

MANOVA, finally

So, after three posts of recoding, creating scales, checking reliability and distributional assumptions we have arrived at MANOVA.  If you skipped those three posts, feel shame at trying to take shortcuts, go back and read them. Before we dive into coding, let’s take a look at some basic background on MANOVA. The difference between ANOVA…

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MANOVA from beginning to end : Creating the scales

Last time, we saw how to recode variables to score answers correct or incorrect, on a rating scale and weighted by importance. Today, we’re going to look at creating some scales from those variables because for reasons I’m sure I have written about at some point in the past, single items are usually not very…

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Getting STC files into SAS Studio – one reason I’m using it for class

It’s been almost two weeks of reviewing textbooks, revising my syllabus and I have to go back to it in a couple of hours to edit my last few powerpoints before class starts. Yes, when I was a brand-new baby professor I was sometimes rushing to write a lecture before class, but now that I…

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Pointy, Clicky Propensity Score Matching With SAS

Hopefully, you have read my Beginner’s Guide to Propensity Score matching or through some other means become aware of what the hell propensity score matching is. Okay, fine, how do you get those propensity scores? Think about this carefully for a moment, if you are using quintiles, you are matching people by which group they…

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How to compute a standard deviation and control chart when you don’t have raw data

It ought to be easier than this and perhaps I could have found an easier way if I had more patience than the average ant or very young infant. However, I don’t. Here was the problem. I wanted control charts for two different variables, satisfaction with care, surveyed at discharge, and satisfaction with care 3…