stratified sample

noun

statistics a sample that is not drawn at random from the whole population, but separately from a number of disjoint strata of the population in order to ensure a more representative sample See also frame (def. 13)

Words nearby stratified sample

stratificational grammar, stratified, stratified charge engine, stratified epithelium, stratified random sample, stratified sample, stratiform, stratiformis, stratify, stratig., stratigraphy