Poker Tracker Stats converge

[jayheaps]

quick question about PT stats when looking at opponents. After how many hand do you think an opponents stats, particularly VPIP and aggressiion will be within a few % of their "true" rate?

In other words after how many hands can opponent's stats be reliable? I am looking for more of a math answer than an intuitive one.

For me, i'll start to look at stats with 75 hands however i dont put too much weight on them until around 250.