crash courses in....

[smasongarrison]

A Matrix Formulation of the Multiple Regression Model: https://online.stat.psu.edu/stat462/node/132/

[smasongarrison]

Getting started simulating data in R:

shiny: https://aosmith.shinyapps.io/tutorial_simulation_helper_functions/
blog: https://aosmith.rbind.io/2018/08/29/getting-started-simulating-data/