Read Significance Without Fooling Yourself
Run the test long enough to trust the result.
Noise Looks Like Signal
Early in a test, the challenger might look amazing purely by luck. Statistical significance is how you tell a real effect from random noise. 🎲
What a p-value Means
A p-value estimates the chance of seeing your result if the two models were truly equal. A small p-value means the gap is unlikely to be pure luck.
All lessons in this course
- Split Traffic Between Model Versions
- Pick Metrics That Matter
- Read Significance Without Fooling Yourself
- Promote or Roll Back the Winner