Minimum Sample Size: 7,690 
Calculate baseline conversion rate


Control Size: 3,845  Test Size: 3,845 
The expected conversion rate of the control group. This can be obtained through a monitoring campaign or checking the historical data. 

The minimum relative change in conversion rate you would like to be able to detect. Given a 10% baseline conversion rate and a 20% MDE, the minimum conversion rate of the test group you would like to be able to detect is 10% * (1 + 20%), i.e. 12%.  
The proportion of the sample to include in the control group. 
The probability of the test rejecting the null hypothesis (H_{0}) when it is true.  
The probability of the test rejecting the null hypothesis (H_{0}) when the alternative hypothesis (H_{1}) is true. 