[quinn]

What is the probability that a person who has a 10% ROI over 100 SNGs has a real ROI over 0%?
What about the same question, but for..
250 SNGs?
500 SNGs?
1000 SNGs?
Assume that the player and all his opponents always play with the exact same skill level.
We can define "real ROI" to be the ROI that the player would have over an infinite number of SNGs.