Linearity

{
  "id": "MLC-T-ENV-015824",
  "term": "Linearity",
  "field": "Environment",
  "definition": "1. (LYNN-ee-AIR-it-ee) How closely an instrument measures actual values of a variable through its effective range; a measure used to determine the accuracy of an instrument.\n\n2. Degree to which measured values agree with respective reference values. Linearity is quantified using a linear regression of pairs of measured values and reference values over a range of values expected or observed during testing. Perfect linearity would result in an intercept, a 0, equal to zero, a slope, a 1, of one, a coefficient of determination, r 2, of one, and a standard error of the estimate, SEE, of zero. The term “linearity” is not used in this part to refer to the shape of a measurement instrument's unprocessed response curve, such as a curve relating emission concentration to voltage output. A properly performing instrument with a nonlinear response curve will meet linearity specifications.",
  "subject": "Laws, regulations and executive orders",
  "references": [
    "Drinking Water Technical & Legal Terms",
    "40 CFR 1065.1001 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/linearity/"
}