I ran a split test with the following results, and even though B is the obvious winner in terms of conversion rate, I wanted to test for statistical significance of the results. Not sure if this matters, but Test A was the control. Here are my results: Test A deliveries: 16902 Test A successes: 174 Test B deliveries: 16895 Test B successes: 198 Test C deliveries: 16892 Test C successes: 186 Is there an easy way to do this in excel 2007? If you could show me the step-by-step so I can do it in the future, I’d appreciate it. Thanks!