Per Jessen wrote: > I don't think you need to know much about statistics - AFAIK, the > harmonic mean of a group of numbers is simply the reciprocal of > the 'normal' mean: > > harmonic_mean(3,4,5,6) = 1/mean(3,4,5,6) Ignore that. /Per Jessen, Zürich -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php