Re: How many multi sng\'s till good guess on ROI?
Standard deviations for multitable tournaments may be slightly more sensitive to your playing style and ability than is the case for single table SNGs.
I don't record all SNGs I play, but after 15 multitable SNGs on PokerStars (6 3-table, 9 2-table), my SD is 2.6 buy-ins/tournament. I would estimate that after n tournament, the standard deviation of my ROI would be about 260%/sqrt(n). By contrast, my standard deviation for single table SNGs is about 1.7.
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