PCA
Spark
A/B Testing
https://www.youtube.com/watch?v=I3FBJdiExcg
https://www.youtube.com/watch?v=7yAw1nPareM
https://towardsdatascience.com/evolutionary-feature-selection-for-machine-learning-7f61af2a8c12
https://github.com/kerenskybr/26_weeks_datascience