Re: [Paddlewise] Rudder redux

From: Nick Schade <nick_at_guillemot-kayaks.com>
Date: Tue, 3 Jul 2007 15:51:42 -0400
On Jul 2, 2007, at 10:08 PM, Craig Jungers wrote:

> Anecdotal evidence is generally held to be that given by untrained  
> observers
> or hearsay ("I heard bob said he went faster with a rudder").  
> Caffyn's data
> (not his "report" - whatever that is) is a written record of miles  
> travelled
> over a long period of time set down by an expert in the field. So when
> Caffyn states that he thought the rudder made him go faster that  
> may be
> anecdotal. But when he says that the statistics indicate that he  
> went faster
> with a rudder it's not anecdotal. But, of course, one can do a lot  
> with
> statistics.


I guess I don't see any statistics here. There is a sample of one.  
Caffyn found a difference with previous experience only once. It  
happened to occur over a long stretch of coast immediately after a  
previous long stretch of coast, but it is still only one single  
event. Statistics require several samples. This is not statistical  
data, but a report of an observation and one man's perception of what  
was going on. He has not done anything to raise it above the level of  
anecdote. The fact that Caffyn is an "expert" makes it an anecdote  
worth paying attention to, but his conclusions are still capable  
being mistaken.

Nick Schade

Guillemot Kayaks
824 Thompson St
Glastonbury, CT 06033
USA
Ph/Fx: (860) 659-8847
http://www.guillemot-kayaks.com/
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Received on Thu Jul 05 2007 - 05:58:02 PDT

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