RE: WRES AND OUTLIER IDENTIFICATION/EXCLUSION

From: Nick Holford n.holford@auckland.ac.nz Subject: RE: [NMusers] WRES AND OUTLIER IDENTIFICATION/EXCLUSION Date: Monday, September 25, 2006 4:56 PM Bill, If removing outliers didnt make any difference to the results then why would you want to remove them? It seems to me that one only removes outliers if it really makes a difference to the results. I agree that you then have to try to explain why the differences exist and why results without outliers are preferable to other results with outliers. This is a game I really try not to play unless outliers can clearly be shown by independent means to be data errors. Nick -- Nick Holford, Dept Pharmacology & Clinical Pharmacology University of Auckland, 85 Park Rd, Private Bag 92019, Auckland, New Zealand email:n.holford@auckland.ac.nz tel:+64(9)373-7599x86730 fax:373-7556 http://www.health.auckland.ac.nz/pharmacology/staff/nholford/