At 10:44 PM 4/29/99 +0100, you wrote: >Fire 10 shots from a gun at a target. >If the 10 holes in the target are tightly grouped, but near >the outer, you are precise but not accurate >If they are loosely grouped evenly around the bull, you are >accurate, but not precise. >If you can get them tightly grouped around the bull, you >are precise and accurate > >In mathematical terms: >Accuracy is the closeness of the mean to the target figure >Precision is indicated by the standard deviation >
Wonderful! I love your explanation! Thank you Mike! I've been trying to explain standard deviation to a co-worker but couldn't think of a good verbal description that would get the point across (at least with any degree of accuracy :-) Thanks so much for your excellent illustration. Charles Gann (ancient at 44)
