Simon Willison’s Weblog

13th September 2009 - Link Blog

Effective A/B Testing. Impressively comprehensive presentation on A/B testing, from theory to practice to statistical analysis of the results.

Posted 13th September 2009 at 11:49 pm

Recent articles

GLM-5.2 is probably the most powerful text-only open weights LLM - 17th June 2026
Publishing WASM wheels to PyPI for use with Pyodide - 13th June 2026
Claude Fable is relentlessly proactive - 11th June 2026

This is a link post by Simon Willison, posted on 13th September 2009.

ab-testing 7 ben-tilly 1 buckettesting 3 statistics 4

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe