Stratified sampling

{
  "id": "MLC-T-CHM-011460",
  "term": "Stratified sampling",
  "field": "Chemistry",
  "definition": "A sampling procedure in which a heterogeneous population is first divided into distinct, non-overlapping subgroups called strata, based on shared attributes or characteristics. A random sample is then drawn from each individual stratum, rather than from the population as a whole. The size of the sample taken from each stratum is often proportional to the relative size of that stratum within the total population.",
  "subject": "Chemistry and Human Health",
  "see_also": [
    "population"
  ],
  "references": [
    "PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 950 (https://doi.org/10.1351/PAC-REC-08-07-09)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/stratified-sampling/"
}