Date: Sun, 17 Aug 1997 03:06:28 -0400 From: "Gary T. Corcoran" <garycorc@idt.net> To: Greg Lehey <grog@lemis.com> Cc: "Christopher R. Bowman" <crb@Glue.umd.edu>, chat@FreeBSD.ORG, platforms@FreeBSD.ORG Subject: Re: speed test Message-ID: <33F6A2F4.91EEDCFA@idt.net> References: <199708161005.MAA02831@desk.jhs.no_domain> <Pine.SOL.3.95q.970816162837.1497A-100000@divot.eng.umd.edu> <19970817150137.64846@lemis.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Greg Lehey wrote: > > If I remember correctly 3-sigma is esstentially a short-hand for 1 in a > > million. It derives from statistics where given a gaussian (bell) > > distribution, the probability of anything outside 3 sigma (sigma is a ususally > > the standard deviation) from the average is like .999997 or something > > close to that, which is basically 1 in a million. Motorola was big into > > this basing their near zero defect quality project on this catch > > phrase. > > Didn't Moto have a 7-sigma goal? > > Greg You're close - as I recall, they had a 6-sigma goal, and I believe that is what the above actually refers to... A previous poster gave what is probably the real definition of 3-sigma. Gary
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?33F6A2F4.91EEDCFA>