I’ve noticed that most reports and graphs round to one decimal place. However, for tests that we’re conducting, that’s not enough precision.
For example, we use a Custom Report to analyze test groups, and presently we’re seeing a 0.3% conversion rate in the test and control groups, which would imply no change. But in fact the groups might actually be 0.26% vs 0.34% - which is a significant difference for us.
I’ve searched the forums and have been surprised to see this not discussed much.