
NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Lu Abel
Date: 2015 Jul 19, 19:41 +0000
From: Francis Upchurch <NoReply_Upchurch@navlist.net>
To: luabel@ymail.com
Sent: Sunday, July 19, 2015 12:11 PM
Subject: [NavList] Re: What precision is required in cel nav?
Umh!John, re the statsI'm certainly no mathematician, but statistics I do know.(medical research).There are lots of problems with this. Very selective data ("cherry picking", we call it ) and fairly arbitary exclusion of "bad outliers" . This would never get past the FDA I can tell you that from 30 years experience. I very much doubt these data are worth the paper they are written on.Perhaps a professional statistician could give their opinion?Also, I assume all done on big ships? Not 30-40ft yachts? Umh.I personally do not believe a word of this. But happy to be corrected by those who know better!Best wishesFrancis