Definitions for "Stratified sampling"
A sample that is grouped according to a dimension believed to be important, such as race, sex or age. The sample is then drawn separately for each group.
probability sampling method in which the population is first divided into groups or strata on the basis of one or more characteristics of interest.
involves dividing the population of interest according to a common characteristic or attribute, then conducting a probability sample within each group (180)
Keywords:  index, fund, see
See Index Fund.