The strong benefit of confidence intervals is that they are empirically verifiable. If you go back and look at your past 90 % estimates and you find that not ro

The strong benefit of confidence intervals is that they are empirically verifiable. If you go back and look at your past 90 % estimates and you find that not roughly 9 out of 10 were correct, you need to revise your process. Averages of averages lack this very practical, immediate interpretation.