Week 15
Chapter 23: Model basics
Section 23.4 – Formulas and model families: http://r4ds.had.co.nz/model-basics.html#formulas-and-model-families
Section 23.5 – Missing values: https://r4ds.had.co.nz/model-basics.html#missing-values-5
Section 23.6 – Other model families: https://r4ds.had.co.nz/model-basics.html#other-model-families