Interpretation analogous to Pearson r — IITM BS previous year questions

Interpretation analogous to Pearson r is part of Point Bi-Serial Correlation Coefficient (L4.9), Week 4 in Statistics 1. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.