A/B testing (i.e. running a controlled experiment, normally in a digital environment like a website or an application) is prevalent nowadays. All of the biggest tech companies you know – Microsoft, Netflix, Booking.com, Google – run thousands of experiments per year. Now it’s weird if you don’t run A/B tests. There are dozens of tools ... Read more| Alex Birkett
A central feature of sequential testing is the idea of stopping “early”, as in “earlier compared to an equivalent fixed-sample size test”. This allows running A/B tests with fewer users and in a shorter amount of time while adhering to the targeted error guarantees.| Blog for Web Analytics, Statistics and Data-Driven Internet Marketing | Analy...