Uncertainty of measurement

{
  "id": "MLC-T-CHM-012418",
  "term": "Uncertainty of measurement",
  "field": "Chemistry",
  "definition": "A non-negative parameter attached to a measurement result that describes how widely the values reasonably attributable to the quantity being measured are spread, expressing the incomplete knowledge of that quantity's value. It is stated as a standard deviation, called the standard uncertainty, or as a multiple of one, as in the expanded uncertainty obtained with a coverage factor of 2, which corresponds to about 95 percent coverage.",
  "see_also": [
    "measurand"
  ],
  "references": [
    "VIM (https://www.iso.org/standard/45321.html)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/uncertainty-of-measurement/"
}