1st - 10
2nd - 8
3rd - 7
4th - 5
5th - 3
6th - 2
7th - 3
8th - 2
9th - 0

Input 480
Total Won 867.5
ROI 81%
Net $387.50
Avg Net $9.69

This is not attainable in the long run. I believe the sustainable ROI 2 plus 2 posts for this level is something like 24% while 4 tableing. You're probably just on a good run.

No, this isnt sustainable unless youve found a place with absolutely clueless players. 40% ROI is more realistic at the $12 level.

The players are pretty clueless...

How many SNGs to get a true sample?

1. No. of Entries = 40
2. Sum of Entries = 131
3. Mean Average = 3.275
4. Std. Dev. = 2.11

95% chance that my true average lies between 1st (1.165) and 5th (5.375)

These stats are not sustainable at all. Even against bad players. You are clearly on a major heater.

You have a sample size of 40 games. You will need a sample size MUCH greater than that to get an idea of what your true ROI is. You'd probably need more than 400 as a bare minimum to get a real indication of what your ROI is.

Any ROI above 30% is excellent.

You WILL hit a downswing sometime and it WILL feel awful. It's how you deal with the impending downswing that will define your success.

Yes, a 95% chance that your true average is out of the money! I would think you need several hundred tourneys to get a credible distribution of results.

I've always been meaning to ask, and this seems like a suitable place to ask it.

I haven't been keeping separate records for my SnG's and MTT's (I didn't think to when I started record keeping, and separating the data now seems a bit... much).

But can MTT's have a higher overall RoI than SnG's (although obviously more variable due to their size)?

I cant think of any reason they couldnt have a higher ROI for any given player.

They require somewhat different skill sets and a player may be better at one than the other. The house take on them is pretty similar so that shouldnt favor one over the other. The larger stack/blind ratios of MTTs lend itself to skill being more important (this was more true under the old Party blind structures), and overall I think the quality of SnG players is higher because there arent as many horrible players lured in by the big payoffs.

As you point out the variance can be a killer in the MTTs, but one first place finish supports an awful lot of entry fees.

Ride that horse, but hold on, because it's gonna try and buck...right up the behind.