(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 (sense 13)
adjective 1. Geology. occurring as a bed or beds; arranged in strata. 2. Anatomy. noting arrangement in thin layers, as in bone. 3. Meteorology. (of a cloud) having predominantly horizontal development. adjective 1. (of rocks) occurring as or arranged in strata 2. (meteorol) resembling a stratus cloud
[strat-uh-fawr-mis] /ˌstræt əˈfɔr mɪs/ adjective, Meteorology. (of a cloud with cumuliform elements) 1. occurring in a very extensive horizontal layer.
verb (used with object), stratified, stratifying. 1. to form or place in strata or layers. 2. to preserve or germinate (seeds) by placing them between layers of earth. 3. Sociology. to arrange in a hierarchical order, especially according to graded status levels. verb (used without object), stratified, stratifying. 4. to form strata. 5. Geology. to […]
[struh-tig-ruh-fee] /strəˈtɪg rə fi/ noun 1. a branch of geology dealing with the classification, nomenclature, correlation, and interpretation of stratified rocks. stratigraphy /strəˈtɪɡrəfɪ/ noun 1. the study of the composition, relative positions, etc, of rock strata in order to determine their geological history stratig 2. (archaeol) a vertical section through the earth showing the relative […]