Statistics requires you to flip back and forth between formula appendices, example pages, and practice problems. Doing that on a pirated, low-resolution PDF is a headache you don’t need during exam week.

Struggling with a specific chapter? Let us know in the comments—we can help you solve it the old-fashioned way!

If you have ever taken an introductory statistics course in India or several other parts of South Asia, one name is almost impossible to escape: S. P. Gupta .

S. P. Gupta’s Statistical Methods is a fantastic tool to learn data science the "analog" way. While finding a free PDF is tempting, supporting the author ensures that future editions continue to get updated for the age of Big Data and AI.