Re: [Bug-gnubg] Snowie 4 vs. GNU 0.13

[Øystein Johansen]

Nardy Pillards wrote:

> From: "Joern Thyssen" <address@hidden>
> Sent: Monday, June 09, 2003 12:14 PM
>
>
>  
>
> > On Mon, Jun 09, 2003 at 12:12:23AM -0300, Albert Silver wrote
> >    
> >
> > > Hi all,
> > >
> > > This is just to report that the series of 100 7-point matches
> > > has finished and the final score was 56-44 in GNU's favor. Attached are
> > > the matches so that any may see them. Many thanks to Tony Lezard for his
> > > program that made the match-up possible, and of course a huge
> > > congratulations to the GNU team.
> > >      
> > Can someone help me to calculate the std. deviation, please!
> >
> >    
> [snip]
>
>  
>
> > Jørn
> >    
>           _______________________
>          /       2            2
>         /  nSUM(x ) - [SUM(x)]
> STDEV = V   ---------------------
>                  n(n-1)
>
> with 56 and 44: STDEV=8.485281374
>
>  
This is not what I was about to type.

std.dev = sqrt( n * p * q )

p = Estimated probability of GNU winning based on the trials.
q = 1 - p
n = number of trials.

std.dev = sqrt( 100 * 0.56 * 0.44) = 4.964

-Øystein