Correlation

It’s a statistical measure that expresses the linear correlation of two variables. It's commonly used in order to describe simple relationships without making statement about the cause and effect.

Resource:  Correlation Doesn’t Equal Causation: Crash Course Statistics #8 (CrashCourse – Youtube) 

Type: Video 
Who it’s for: Anyone looking for an easy-to-digest dive into correlation with useful visuals. 
Why we love it: This video presents many useful visuals that reinforce key ideas. You’ll also learn how to interpret claims that involve correlations.