On Fri, 05 Oct 2007 16:49:31 -0500, "Mumia W."
<paduille.4061.mumia.w+nospam@earthlink.net> wrote:

>I know the mean can be calculated "on the fly"--without storing all of 
>the values to be examined, but I can't see how this is to be done with 
>the median; I don't think it's possible.

Sure it is possible: