marginal means

The Difference Between an Odds Ratio and a Predicted Odds

May 20th, 2022 by

When interpreting the results of a regression model, the first step is to look at the regression coefficients. Each term in the model has one. And each one describes the average difference in the value of Y for a one-unit difference in the value of the predictor variable, X, that makes up that term. It’s the effect size statistic for that term in the model. (more…)

Using Marginal Means to Explain an Interaction to a Non-Statistical Audience

July 10th, 2018 by

Even with a few years of experience, interpreting the coefficients of interactions in a regression table can take some time to figure out. Trying to explain these coefficients  to a group of non-statistically inclined people is a daunting task.

For example, say you are going to speak to a group of dieticians. They are interested (more…)