This blog post will cover what centering is, what a sum-to-zero contrast is, why and when you should use them, and how you can do them in R. Specifically, we will focus on their use and how they affect coefficient interpretation in regression tab...

Over a year ago, while listing to a very not-at-all-statistical podcast, I discovered that Bayesian modeling is widely used in archaeology since the mid 90s to calibrate carbon dating.1 Carbon dating is a scientific method used to determine the a...

Preface I was basically done with this blog post when I came across Matti Vuorre’s post on the same exact topic. Matti goes into all the details, and really the present post can be seen as a brief account of all the cool things the probit-approa...

This post by no means endorses the use of pie charts. But, if you must, here’s how… For some reason, the top Google results for “ggplot2 pie chart” show some very convoluted code to accomplish what should be easy: Make slices Add labels to the m...

Often (especially when working with large and/or rich datasets) our (gg)plots can feel cluttered with information. But they don’t have to be! Let’s look at the following plot: Generate some data library(dplyr) bfi % ...

Analysis of variance (ANOVA) is a statistical procedure, developed by R. A. Fisher, used to analyze the relationship between a continuous outcome (dependent variable) and categorical predictors (independent variables). This procedure produces a l...

A group of people were asked to what degree they agree or disagree with a statement at two time points. Agreement