Omega Statistics Blog


GRIT. A RESEARCHER’S BEST FRIEND

A man jumping over a ledge with the word Success on it

Instead of writing about a statistical concept in this post I wanted to share something I’ve discovered about myself and other successful people I’ve worked with. I am hoping you will also find it useful and fun…

I find a large part of being a private practice statistical consultant is talking people down from the…

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WHEN DUMMY CODING IS THE WISE THING TO DO

Zeros and Ones in a pile.

Coding groups on nominal (categorical) groups of an independent variable is not a problem in analyses such as t-tests or ANOVA. However, things can fall apart fairly quickly if nominal variables are not coded properly for use as predictors in linear models such as multiple regressions.

Let’s take a simple example of a variable for…

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REGRESSION TIPS – DUMMY CODING

Students Working On Code

One interesting and very useful aspect of dummy coding is the ability to use these dichotomously coded variables as predictors in a regression model.

A regression model does just that, it models something, represents something.

Let’s investigate a hypothetical model of stress.  We want to see if biofeedback training and gender have an effect on…

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