SmartStats is the VWO’s Bayesian-powered statistics engine for A/B testing. This engine gives you intelligent results to make smarter business decisions and reduces your testing time by half. The Bayesian statistics help compute actual probabilities and also communicate the uncertainties associated with statistical estimates.
With SmartStats, VWO directly addresses your real question—what is the probability of A beating B. It ensures that you stay in control. At any point in a test, if it looks like you are making a methodology error that may affect the experiment, VWO prompts you to not proceed with that action.
You can now plan better, have a more accurate reason to end tests, and really understand how close or far apart A and B are.