Great read. What bothers me about A/B tests is when people say, eg."there was a 7% improvement" without telling us the sample size, or error margin. I'd rather

Great read. What bothers me about A/B tests is when people say, eg."there was a 7% improvement" without telling us the sample size, or error margin. I'd rather hear: On a sample size of 1,000 unique visits, the improvement rate was 7% +/- 4%