Precisely hitting a target means all the hits are closely spaced, even if they are very far from the center of the target. If you do not need For example, a ruler marked in millimeters is accurate only up to the millimeter because that is the smallest unit available.
Accuracy and Precision: Accuracy refers to the closeness of a measured value to a standard or known value.
Overview There are certain basic concepts in analytical chemistry that are helpful to the analyst when treating analytical data. An example is the numberwhich may be interpreted as having one, two, or three significant figures. However, because there are many different units e.
Although errors in calculations can be enormous, they do not contribute to uncertainty in measurements. Therefore, the error can be estimated using equation Precision The term precision is used in describing the agreement of a set of results among themselves.