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 I think Off to the annual BSS conference tomorrow for an entertaining weekend. Hope to see some of you there. Mike Shaw [EMAIL PROTECTED] 53.37N 3.02W
