How do you determine the winner if the criteria is Open Email. If it's based on the count of open email during the testing, can someone explain why on our testing the winner was Subject B but Subject A performed better.
These are the result:
Subject A - Open Email: 303
Subject B - Open Email : 299
It is based on the open rate. Which is calculated by # of opens/# delivered. So, it is possible for the B test group to win if it had a smaller delivery group. Hope this helps!