# Search Results for: factor analysis

## 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…

## MANOVA beginning to end: Recoding Data is Part of the Process

Other people want to go see the new Wonder Woman movie. I’ve been wanting to talk about MANOVA, but first, we need some decent dependent and independent measures. I have the India Human Development Survey data on over 39,000 women and my hypothesis is that education is related to women’s rights’ issues, especially autonomy, health…

## A Beginner’s Guide to Propensity Score Matching

One advantage of writing this blog for almost a decade is that there are a lots of topics I have already covered. However, software moving at the speed that it does, there are always updates. So, today I’m going to recycle a couple of older posts that introduce you to propensity score matching. Then, tomorrow,…

I went to the Western Users of SAS Software conference last week and came home sad. It wasn’t for the reasons you’d guess. No one sexually harassed me (as if!). I did not forget how to code a confirmatory factor analysis in the middle of the pre-conference class I was teaching. The other statisticians didn’t…

## Variance and Eigenvalues

I find this scree plot of eigenvalues very helpful in identifying the number of factors. A scree plot is a plot of the eigenvalues by the factor number. I realized this is only helpful if one understands what an eigenvalue is. First of all, go way back to Stat 101 & remember that correlation is…

## Getting Involved in the SAS Community: How and Why

Why? Are you kidding me? If you are a programmer, analyst, statistician, professor or student who uses SAS this is an opportunity to get to know your people and to get known. I’m in Dallas for the SAS Global Forum, which I try to attend whenever I can. Yes, I could watch videos on the Internet,…

## My Year in Books: Technical Edition

I read a lot. This year, I finished 308 books  on my Kindle app, another dozen on iBooks, a half-dozen on ebrary and 15 or 20 around the house. I don’t read books on paper very often any more. It’s not too practical for me. I go through them at the rate of about a book…

## Reports of The Death of Theory Have Been Greatly Exaggerated

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…

## Yes, You Totally CAN Understand Model Fit Statistics, with M & M’s

Ever wonder why with goodness of fit tests non- significance is what you want? Why is that sometimes when you have a significant p-value it means your hypothesis is correct, there is a relationship between the price of honey and the number of bees, and in other cases, significance means your model is rejected? Well,…

## Virtual Machine vs SAS On-demand for Academics

I’ve been pretty pleased with SAS Studio (the product formerly known as SAS Web Editor), so when Jodi sent me an email with information about using a virtual machine for the multivariate statistics course, I was a bit skeptical. Every time I’ve had to use a remote desktop connection virtual machine for SAS it has…