Is your test result significant? Does it have enough power?
Play with the controls and get a better feel for how a lower confidence level will boost the power or how an increase in test size can make a small CR-difference significant!
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Variation B's observed conversion rate () was higher than variation A's conversion rate (). You can be 95% confident that this result is a consequence of the changes you made and not a result of random chance.
The observed difference in conversion rate () isn't big enough to declare a significant winner. There is no real difference in performance between A and B or you need to collect more data.
Visualisation of Power () and the expected distributions of variation A and B.