There is no such thing as a confidence interval for sit-n-go's.

[RobGW]

Your memory serves you well. I think some people have been misguided by the fact that their distribution of finishes is not normal. You dont need a normal distribution to calculate a confidence interval. As the number of tournaments grows, the results will begin to form a normal distribution. This will give an expected win rate per hour, avg finish, roi, etc. Each with a certain confidence interval. Will this help you in your next tournament? No, but it may help you convince your wife/parents that you can make money. It can help you decide whether to quit your day job.