A/B Test Calc

Statistical significance means the difference between variants A and B is unlikely due to random chance. A confidence level of 95% or higher is the standard threshold.

The chi-squared test compares observed frequencies to expected frequencies to determine if there is a significant association between the variant and conversion outcome.

More data gives more reliable results. As a rule of thumb, aim for at least 1,000 visitors per variant. The required sample size depends on the expected effect size.