Quote:
Originally Posted by devellis
The "accurate" and "precise" concept refer to bias and consistency (or validity and reliability). An unbiased (accurate) device gives a correct value on average. A precise device gives highly consistent values.
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I think the term "bias" might be confounding.
In the diagrams above, an accurate shot pattern would be a bunch of shots that hit all around the center of the target. A precise pattern would be tightly grouped, regardless of where they hit the target.
They are two truly different behaviors, operating in two different and independent "axes".
In the tuner world, it does you no good to have a tuner that can measure and display down to 0.000000Hz, but that only repeatably measures to within +/- 5.000Hz That example is super precise and terribly inaccurate.