explaination of stadard deviation

[drgenefish]

Can someone please explain how I can use the Standard Deviation / bb stat?

If mine is 110 bb, does that mean in my average session I will fluctuate from winning to losing 110bb / 100 hands?

Thanks.

[Rvg72]

My statistics are a bit rusty but that's the basic concept. The majority of the time you will be within +/- 110bb/100 of your average win rate.

[TierTier]

Err....without reference to a sample size you can't say much of anything.

The formula you want to use is: 1.96*(s/sqrt(n)). Take that number and add and subtract it to your bb/100 and you will have a range. You can be 95% sure true mean falls somewhere in there.

If you want to be more or less certain than 95% then change the 1.96 to an appropriate z-score.