OpenEuphoria

Re: Mathematicians !! Percentile/Quartile function

• Posted by Pete Stoner <stoner.pete at gmail.com> Sep 07, 2005
• 592 views

Pete Stoner wrote:
> 
> Pete Lomax wrote:
> > 
> > On Wed, 07 Sep 2005 09:45:41 -0700, Pete Stoner
> > <guest at RapidEuphoria.com> wrote:
> > 
> > >i.e. for values of {2, 6, 7, 10, 14, 15, 16} the quartiles are 6.5, 10 and
> > >14.5
> > >but for a range of {2, 6, 7, 10, 14, 15} the correct quartiles seem to be
> > >6.25, 8.5 & 13
> > FWIW, (and strictly from observation only!) the first is (or might be)
> >  (6+7)/2, 10, (14+15)/2, while ths second is (or might be)
> > (2+6+7+10)/2, (7+10)/2, (10+14+15)/2
> > 
> > As I don't have either Excel or 123 to hand, I can't experiment more,
> > but I wonder what happens with sets of longer numbers.
> > 
> 
> I just tried it with a larger set..
> {2,2,2,3,6,6,8,8,10,12,12,14,16,19,22,25,28,28,32,33}
> results are Lucius - 3, 12, 22
> Juergen and I got 6, 12, 23.5
> 123 and Excel give 6, 12, 22.75
> 
> Regards Pete
> 


and since the results seem to get closer with a larger sample...
with
{2,2,2,3,6,6,8,8,10,12,12,14,16,19,22,25,28,28,32,33,34,35,36,38,40,41,45,48,49,51,53,56,57,57,57,59,61,61,62,62}
Lucius - 10, 33.5, 51
Juergen and I got 12, 33.5, 52
123 and Excel give 12, 33.5, 51.5

Maybe I should run this as a competition!