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