Video 8: Interaction in regression analysis

In this video I go over what interaction means and how it is interpreted within the context of (linear) regression analysis. 0:00 Introduction of the video 0:39 Definition of interaction 1:57 Recap on linear regression 4:11 Situation and data for this video 6:29 Analysis of the data in aggregate 7:34 Basic idea of interaction 8:47 Regression model with an interaction term 10:12 Stratified analysis of the data 11:47 Step-by-step interpretation of a model with interaction 16:27 Final remarks Link to the video about the basic principles of linear regression: https://youtu.be/6kwtQW3OY_s