Previously, I discussed how to do a confirmatory factor analysis with Mplus. What if you aren’t sure what variables should load on what factor? Then you are doing an exploratory factor analysis. Really, you should probably do the exploratory factor analysis first unless you have some very large body of research behind you saying that…
Being able to find SPSS in the start menu does not qualify you to run a multi-nomial logistic regression. This is the kind of comment statisticians find funny that leaves other people scratching their heads. The point is that it’s not that difficult to get output for some fairly complex statistical procedures. Let’s start with…
Someone had a question about factor analysis with Mplus and even though it is not a piece of software I work with normally, we aim to please at The Julia Group, so I downloaded the demo version and away I went. It truly was, as my granddaughter says, easy-peasy lemon squeezie. You might not think…
Here is the scenario … 1. The researcher had a return rate more than triple the average return rate for emailed surveys in general. This return rate was despite apparently not having any of the features related to higher return rates – incentives for completion, an advance postcard or email explaining the survey and incentives,…
Trying this live blogging from SAS Global Forum again. The title kind of says it PROC QUANTLIFE new procedure in SAS 9.3 Why DO we need a new procedure for survival analysis? ====== Survival analysis used to analyze time-to-event data already had procs lifetes, lifereg & phreg ======== Lifereg is fine if you have IID…
I’m always a bit bemused when people refer to me as a “SAS expert”. I don’t think of myself as an expert at anything except, perhaps, bricolage, a word I am indebted to sascommunity.org for even being aware of its existence. Merriam-Webster defines it as: : construction (as of a sculpture or a structure of…
” … we may then define intellect in general as the power of good response from the point of view of truth or fact.” – Thorndike, 1921 Edward Tufte impresses me. His books on visual data show him as possessing in copious amounts that very rare commodity – truly original thoughts . So, when he tweeted…
There has been far more heat than light surrounding the current controversy over whether a transgender (male to female) fighter should be allowed to compete in mixed martial arts in the women’s division. This article on The Verge said that opponents of Ms. Fox competition “are not supported by the current science”, citing the fact…
I was going to use SAS Enterprise Guide 4.3 with SAS On-Demand to do my mixed model analysis, but it did not quite work out. First of all, if like me you are used to doing PROC GLM where each subject is one record, you have to change your dataset to be one where each…
The truth is, what I wanted to be talking about today was either data mining, text mining or mixed models. Those are three things I want to be doing more and would be doing more except that we have a Kickstarter campaign going on to fund the next six levels of our game that teaches…