1) Why did the two groups have such different N sizes? If it was intended to be run as a 50-50, a large delta would make me wonder if there was an exposure bias
2) For the baseline rate (0.4%), this test is underpowered for even a 50% change, meaning you will have a high false discovery rate
1) Why did the two groups have such different N sizes? If it was intended to be run as a 50-50, a large delta would make me wonder if there was an exposure bias
2) For the baseline rate (0.4%), this test is underpowered for even a 50% change, meaning you will have a high false discovery rate