AB Test Calculator
Use this A/B testing calculator to find out if your test results are statistically significant.
In the boxes below enter the results from your experiment. For each variation you tested, input the total number of tries (emails sent, impressions seen), and the number of goals it completed (generally clicks, but could also be other conversions).
The calculator will tell you the confidence level your data produces for the winning variation. Typically you would be looking for a value above 95% or 98%.