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Get out of your bubble

Whether you are a statistician, SPSS guru, SAS programmer or professor and world-renowned expert on re-incarceration, odds are great that you are susceptible to bubble-vision. You work, breathe and socialize within one or two very narrow bubbles. This is bad and unhealthy. You’ll miss much of life that is beautiful, exciting, dramatic, interesting, tragic and…

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My Adventures with SAS 9.2 v2 and sexual harassment

FINALLY got a few minutes to download the latest version. For some reason the download I received was for the planned installation as opposed to the basic installation. In 25 words or less, basic installation is for stand-alone installs on a single machine, which we have hundreds of users doing. The planned installation would be…

Random non-parametric thingies: This is your brain on stats

Here is how the Wald statistic works: You divide the maximum likelihood coefficient estimate by its standard error and square the result. If you wanted to be really specific about it, what you are dividing is the difference between the obtained coefficient estimate and your hypothesized estimate. I would say, though, that 99% of the…

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The Sea Monkey Effect prevents robot uprising

Since I have written about odds ratios and logs lately, I was going to write about the natural log of the odds ratio, however, random events have caused me to do otherwise. I read an interesting blog by Adam Jackson lately, in which he is concerned that robots will take over the world. At the…

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Logarithms

Logistic regression is based on logarithms. Ordinary Least Squares regression and analysis of variance uses the actual values as the dependent and independent variables in an equation. Logistic regression does not. What is a log, anyway? Let’s start with the very basics. First we learned to add: 5+5+5+5 = 20 After about eight years of…