Standard deviation in Poker Tracker?

[Cyric]

Hi Sharks

Is it possible to see some kind of standard deviation in Poker Tracker? I mean of my own game?

Thx

[davelin]

Sessions -> More Detail button I believe

[tiltaholic]

davelin-
do you know if this PT standard dev. is measuring the standard deviation based on sessions, or based on 100 hand groupings. i know it says SD/100 hands or SD/hour, but was curious exactly what it is measuring...
-t

[davelin]

Good question, that's a question for Pat. Mathematically, does it make a big difference?

[AngelicPenguin]

At the PT forums there was a long discussion about standard deviation. Maybe your question would be answered there:

http://www.pokertracker.com/forum/viewtopic.php?t=1369&highlight=standard+deviation

[DMBFan23]

if your sessions were of pretty different lengths, then yeah it would.

[jskills]

I'd like to think that standard deviation is really useful when looked at per session. For example, if I'm multi-tabling 3 tables for 2 hours and I'm popping on and off tables occasionally (you know how it is at Party when suddenly everyone leaves) I could end up with stats from 6-10 tables. Taken individually, the hourly standard deviation using each table would look quite large, since if you lose or win $5 at a table in a 15 minute period, your average per hour for that table alone will be $20. Try that for 10 tables and you'll get a large number once you're done doing all the square root calculations.

If you just have one entry per session that says, I played today for 2 hours and my net was $15, the std dev for that day is 7.5, which reflects reality. So I'm not sure how Pokertracker does it. I have a spreadsheet that does it both ways ...

[tiltaholic]

thanks for the link.
-t

[chris_a]

The fundamental unit when measuring in poker is always the hand. You'll have some standard deviation (STD) per hand. You can get it by dividing your STD in BB/100 by the square root of 100.

That is, if my STD in BB/100 is 12.5 BB then my STD per hand is 12.5/sqrt(100) = 1.25 BB/ Hand.

To get the STD in BB/Hr. you can take the STD in BB/Hand and multiply by the square root of the number of hands you've gotten per hour.

For instance, if I've had 10000 hands in 166 hours then... you do

STD in BB/Hour = 1.25 * sqrt(10000/166) = 9.68 BB/Hr.

So basically, it doesn't matter what your session length is. These numbers are completely indepedent of that. They work on a per hand basis.

[davelin]

That was my guess as well. *shrug*