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Old 08-09-2005, 12:37 AM
elmo elmo is offline
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Default winrate confidence question

im trying to figure out what my confidence level is on my winrate. i have 2.31bb/100, a 65k hand sample size, with a stdev of 15BB. so since we are talking in terms of 100s of hands, i have a sample size of 65000/100= 650 correct? i only have a vague knowledge of this, so if anyone can help me out, i would appreciate it.

thanks- alex
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Old 08-09-2005, 12:49 AM
pzhon pzhon is offline
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Default Re: winrate confidence question

[ QUOTE ]
im trying to figure out what my confidence level is on my winrate. i have 2.31bb/100, a 65k hand sample size, with a stdev of 15BB. so since we are talking in terms of 100s of hands, i have a sample size of 65000/100= 650 correct?

[/ QUOTE ]
Yes, so the standard error of your win rate in BB/100 is 15/squareroot(650) = 0.59. A 95% confidence interval would be 2.31 +- 1.96*0.59 = 2.31+-1.16.
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Old 08-09-2005, 12:57 AM
elmo elmo is offline
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Default Re: winrate confidence question

thank you sir
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