Re: precision/accuracy

[Lois Breur Krause <krause@CLEMSON.EDU>]

> At 15:35 31/08/99 -0600, Ken Fox wrote:
> > I was once shown this example to distinguish these two terms. What do you
> > all think?
> >
> > Imagine a rifle target at which is fired 5 bullets.
> > Precisopn relates to how closely packed the 5 shots are regardless of
> > where they are on the target. Tight pack = high precision.
> > Accuracy relates to where the shots are with respect to the bull's eye.
> > One in the heart and the other four equally spaced around some outer
> > circle might be high accuracy.
> >
> > A marksman can be accurate and precise, of course.
> >
> > Where does resolution come into this, if it does.
>
> The size of bullet holes?

the width of the rings on the target and how closely you report the
variation- would be my guess.
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Dr. Lois Breur Krause
Department of Geological Sciences
442 Brackett Hall
Clemson University
Clemson SC  29634

teaching chemistry, physics, astronomy and geology to elementary education
majors.

How We Learn and Why We Don't: Student Survival Guide,
available from International Thompson Publishing, ISBN 0324-011970

http://home.earthlink.net/~breurkrause

krause@clemson.edu

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