Simon Willison’s Weblog

Effective A/B Testing. Impressively comprehensive presentation on A/B testing, from theory to practice to statistical analysis of the results. 13th September 2009, 11:49 pm

Cats or Dogs (via) Finds statistically interesting facts based on people answering a sequence of “X or Y” questions. Written in Django by James Tauber in less than four hours. 11th February 2007, 1:49 am