statistics
Importance:

Confidence Interval

Also known as: confidence interval, confidence intervals, CI

A range that expresses how precise an estimate is — far more honest than a single number pretending to be exact.

Confidence Interval

A confidence interval reports an estimate as a range with a stated level of confidence, rather than a deceptively precise point. “12% lift” hides the uncertainty; “somewhere between 2% and 22%” tells you the truth, which is that you don’t really know yet.

I push teams to quote the interval, not just the point estimate. The width of it is information — a wide band is a polite way of saying collect more data before you bet the roadmap on this.