Re: General Philosophy
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If I recall correctly, the point was to point out that you don't actually ever know your true winrate. This is different from saying that winrate doesn't carry information. Your winrate after 10k hands gives you enough information to reasonably say you are a winning player (assuming your BB/100 is above 1 or 1.5 -- someone else can figure that out because I'm not a statistician). After 20k hands, you can say it with even more confidence with the same BB/100.
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Ok, so I went into that link I posted above and played around a bit in Excel. After 20k hands, with a SD/100 of 15BB @ 2BB/100 we can be 95% sure that our BB/100 is somewhere between 0 and 4. This is not too accurate and hence I don't think you can rely too heavily on it. We know OP is a winning player (well, we almost "know), but that's about it. I guess I should have phrased my initial response differently. Over 20k hands, the WR doesn't give us "no information" but it certainly isn't necessarily accurate at all.
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