I dont understand the formula of conversion rate in page variation
I was doing some sample questions please check here,
Variation A is declared a winner at 90% statistical significance with a difference interval of .10% and 4%. The control's conversion rate is 15%. Which of the following could be Variation A's conversion rate?
The answer says 20% how is the formula working ??
Refer to Adam's post here:
Does that make sense? Does his explanation of different interval help?