Precision

{
  "id": "MLC-T-CHM-009355",
  "term": "Precision",
  "field": "Chemistry",
  "definition": "How closely repeated independent results agree with one another when they are produced under stated conditions. It reflects the random error of a measurement process, not its distance from the true value, and is expressed through measures of scatter such as the standard deviation, the variance or the coefficient of variation. Repeatability, the same conditions over a short time, and reproducibility, different laboratories, operators and equipment, mark the two extremes of the conditions under which it is stated.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "accuracy",
    "deviation",
    "standard deviation",
    "load",
    "precision of indication"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 6 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1994, 66, 595. 'Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)' on page 598 (https://doi.org/10.1351/pac199466030595)",
    "VIM (https://www.iso.org/standard/45321.html)",
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2207 (https://doi.org/10.1351/pac199062112167)",
    "Orange Book, 2nd ed., p. 36 (https://media.iupac.org/publications/analytical_compendium/)",
    "Orange Book, 2nd ed., p. 37 (https://media.iupac.org/publications/analytical_compendium/)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/precision/"
}