Anion gap: A measurement of the interval between the sum of routinely measured cations minus the sum of the routinely measured anions in the blood. The anion gap = (Na+ + K+) - (Cl- + HCO3-) where Na-is sodium, K+ is potassium, Cl-is chloride, and HCO3- is bicarbonate.
Precision: Precision refers to the reproducibility of this result that is you get the same result every time you try. Characteristics of Accuracy and Precision: Accuracy: Accuracy refers to the closeness of a measurement to its actual or real value. Precision: Precision refers to the regularity of obtaining the same result frequently. Usage: Accuracy: The concept of accuracy is encountered in measurement in physics and industry.
Definition of precise. 1  1 : exactly or sharply defined or stated. 2  2 : minutely exact. 3  3 : strictly conforming to a pattern, standard, or convention.  4 : distinguished from every other at just that precise moment.