Minimum Control Proportion: 24.39%  Calculate baseline conversion rate  
Control Size: 2,439  Test Size: 7,561 
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 number of all samples, including samples in both test and 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. 