A range of values you expect your test results to fall between if you were to redo the experiment.
A confidence interval answers the question: how probable is it the conversion lift would be close to the same, if the experiment was repeated?
Typically, confidence intervals are set to 1 - the significance level.
A 95% confidence interval show the real result should be within that range 95% of the time. But may be outside that range 5% of the time.« Back to Glossary Index