Helpful resources that I found helpful in my career development.
R
Useful Free Tutorial Text from Harvard: Data Analysis and Prediction Algorithms with R
Posit:Â Cheatsheets for R
Cheatography: 88 R Cheat Sheets
Matlab
Stata
Python
Books and Self-Guided Prep:
Princeton Review GRE Premium Prep (comes w/ 7 free practice tests)
5lb Book of GRE Practice Problems (comes w/ 6 free practice tests)
Magoosh 6-Month Plan (comes w/ $25 vouchers for ETS exams)
Free Practice Exams: