Introductory Statistics - OpenStax College
www.dartmouth.edu/~chance/teaching_aids/books_articles/probability_book/amsbook.mac.pdf
Introduction to Probability
Charles M. Grinstead Swarthmore College
J. Laurie Snell Dartmouth College
suggested in book:
Data Science from Scratch: O'Reilly - Safari Books Online
"For Further Exploration
SciPy, pandas, and StatsModels all come with a wide variety of statistical functions."
