GDC 2016: "Three Statistical Tests Every Game Developer Should Know" by Elan Ruskin (@crash) of Insomniac Games https://gdcvault.com/play/1023323/Three-Statistical-Tests-Every-Game

This was really good. It was basically exactly what it said on the tin, plus gamedev-themed examples which really helped.

The three tests were
1. Student's T Test
2. Paired 2-sample T Test
3. Mann–Whitney U Test

Review: 10/10 This was great because it was concise, actionable, relevant, and answered questions I actually had before watching this presentation.