## Metadata - Author: [[marton-trencseni|Marton Trencseni]] - Full Title:: Reducing Variance in a/B Testing With CUPED - Category:: #🗞️Articles - Document Tags:: [[Hypothesis testing|Hypothesis Testing]], - URL:: https://bytepawn.com/reducing-variance-in-ab-testing-with-cuped.html - Finished date:: [[2024-09-30]] ## Highlights > [CUPED](https://exp-platform.com/cuped/) is a variance reduction technique introduced by Deng, Xu, Kohavi and Walker. Using CUPED we can achieve lower variance in A/B testing by computing an adjusted evaluation metric using historic "before" data. ([View Highlight](https://read.readwise.io/read/01j8zp6239ybjhvh53ymqtab6k)) > CUPED is a win. It allows us to more accurately measure experimental lift if there is correlation between "before" and "after", without degrading measurements if there is not. ([View Highlight](https://read.readwise.io/read/01j8zp9cdfkv50r3swxerv2ghy))