Statistics: How old is the idol

You know the age of idols perfectly! Or were you spying? ^°^?

You know the age of the idols well. You definitely managed the first 2 rounds. Well done!

You know their age on average. Well done!

You don't really know the age of the idols. Don't get upset!

You don't know the age of idols very well or at all. I'm not telling you