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 are four more of Dr. De Mars 55 things I have learned in (almost) 55 years, and that is that there are four thing students should have learned in school but often didn’t. 1. Say what you mean. I don’t know who those teachers are who reinforce students for using longer words, longer sentences…
There are, or so I have heard, people who are energized by parties, meet-ups and social events. I am not one of those people. If I had my choice, I would never go to any gathering larger than our family dinners for the rest of my life. It’s not that I don’t enjoy talking to…
Two questions I get asked occasionally are: Do I get paid to write nice things about software? Why don’t I write more about things I DON’T like? 1. No. The only one who pays for my blog is BlogHer – which is the ads you see – and they don’t seem to care what I…
I highly recommend, The Dip, a short book by Seth Godin that lauds the value of quitting. I wrote about this at greater length on my other blog on judo and life, under the topic, “Know when to hold ’em and know when to fold ’em.” where, being the horrible mean old woman that I…
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,…
If that sounds like total marketing b.s. to you, I can’t blame you — download this app and supermodels will throw themselves at you with thousand dollar bills in their teeth. Well, no super models are provided but the SAS Web Editor really *will* write your code for you in the latest version soon to…
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…