Quote:
Originally Posted by bigpotpoker
what does 180bb/100 standard dev. mean exactly?
It's a statistical measure of volatility. The higher standard deviation something has the swingier it is. Low standard dev means all data points are very close to eachother, high the opposite.
You can probably google up some good explanations if you want to understand it more. It's about how scattered data points are in a set.
5 4 5 6 4 5 5 3 5 =low standard dev
18 2 7 9 6 3 7 1 12 =high standard dev
If the standard dev is low, then a lower winrate can be statistically significant while the same winrate would not be at a higher standard dev. Imagine it yourself: A super swingy poker game will see big swings without it being certain that one person has an edge. One player winning 10 buyins in a super swingy deep stacked PLO game won't tell you much about who is the better player, but if they are playing limit hold'em then winning 1000bb probably is enough to determine who's the best of the two. What exactly 180bb/100 means in a poker sense is: not much. It's normal in HU NLHE. But the number is needed to figure out if winning xbb/100 over y hands is statistically significant or not.