Results 1 to 9 of 9

Thread: nycfudu: dumb question

  1. #1
    nycfudu
    Guest

    nycfudu: dumb question

    What is N0?

    In BJRM it says "Number of hand required to overcome 1 SD"

    So what is 1 SD, is it SD/100 or SD/hand?

  2. #2
    Sun Runner
    Guest

    Sun Runner: Re: dumb question

    Oooo, let me try.

    > What is N0?

    Established by Brett Harris (as far as I know). It is the commonly accepted measure of 'the long run' and the answer culminates in the theoritical number hours it takes to get there, assuming you are comfortable with one SD of variance.

    > In BJRM it says "Number of hand required to overcome 1 SD"

    Actually.. "the number of hands for your EV to overcome one SD of variance."

    The formula: 'N0' is (Variance divided by EV)^2.

    Therefore, if variance is 4.00 units per hand and the win rate is 3.0 units per 100 hands, then N0 equals ((4.00*100)/3.0)^2 ... or 17,777 hands ... or 178 hours to the 'long run'.

    If you feel 2 SDs is a more safe estimation, then it would take 712 hours (4 times the 1 SD number.)

    What all that tells a non-math geek like me is .. the long run is not as far out there as I first imagined.

    Hope that helps (and is accuarte.) I'm operating without a net!!

  3. #3
    Don Schlesinger
    Guest

    Don Schlesinger: Nice try! :-)

    > Oooo, let me try.

    > Established by Brett Harris (as far as I
    > know).

    So far, so good.

    > It is the commonly accepted measure
    > of 'the long run' and the answer culminates
    > in the theoretical number of hours it takes to
    > get there, assuming you are comfortable with
    > one SD of variance.

    Good. But, it's "one SD" (standard deviation). Leave out the variance part, which is actually the square of SD.

    > Actually.. "the number of hands for
    > your EV to overcome one SD of
    > variance."

    Ditto. The "zero" in N0 (N-zero) comes from the fact that when you play the appropriate number of hands, EV - SD = 0. That is, EV = SD.

    > The formula: 'N0' is (Variance divided by
    > EV)^2.

    No, it's (SD/EV)^2. And both must be expressed on a per-hand basis.

    > Therefore, if variance is 4.00 units per
    > hand and the win rate is 3.0 units per 100
    > hands, then N0 equals ((4.00*100)/3.0)^2 ...
    > or 17,777 hands ... or 178 hours to the
    > 'long run'.

    Almost. Instead of "variance," write "SD." Express the win rate as .03 units per hand. Form the ratio 4.00/.03 and then square that, getting your result of 17,777 hands.

    > If you feel 2 SDs is a more safe estimation,
    > then it would take 712 hours (4 times the 1
    > SD number.)

    Correct.

    > What all that tells a non-math geek like me
    > is .. the long run is not as far out there
    > as I first imagined.

    For some, it can be an eternity; for others, just a moment. :-)

    > Hope that helps (and is accurate.) I'm
    > operating without a net!!

    An honest attempt!

    Don

  4. #4
    Sun Runner
    Guest

    Sun Runner: Thanks.

    I won't get it wrong again.

    But I will stay off this page (except to read and absorb.)

    ETFan also caught me zigging when I should have been zagging yesterday.

    I need to leave the heavylifting to the smart guys and just continue living off the fruits of ya'lls labor.

    Hope nobody minds; don't think I'm not grateful.


  5. #5
    Don Schlesinger
    Guest

    Don Schlesinger: No, please post

    > I won't get it wrong again.

    > But I will stay off this page (except to
    > read and absorb.)

    No, please don't. The essence of your post was correct; I just fine-tuned a few details. We welcome your contributions. Please don't be shy (except when airing your views on smoking! :-)).

    Don

  6. #6
    Parker
    Guest

    Parker: Go for it

    If there is one thing I have learned from hosting The Parker Pages, it is that nothing, and I mean nothing, tests your understanding of a particular topic like trying to explain it to someone else.

  7. #7
    Sun Runner
    Guest

    Sun Runner: Thanks. It's all good.:) *NM*


  8. #8
    nycfudu
    Guest

    nycfudu: Thank you all for your help. Greatly appreciated. *NM*


  9. #9
    Cacarulo
    Guest

    Cacarulo: Re: dumb question


    > What is N0?

    > In BJRM it says "Number of hand
    > required to overcome 1 SD"

    > So what is 1 SD, is it SD/100 or SD/hand?

    There is also a thread below started by Wolverine that you might want to read.

    Sincerely,
    Cac



Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

About Blackjack: The Forum

BJTF is an advantage player site based on the principles of comity. That is, civil and considerate behavior for the mutual benefit of all involved. The goal of advantage play is the legal extraction of funds from gaming establishments by gaining a mathematic advantage and developing the skills required to use that advantage. To maximize our success, it is important to understand that we are all on the same side. Personal conflicts simply get in the way of our goals.