Stratified Sampling

Stratified sampling is a method of sampling that involves the division of a population into smaller subgroups known as strata. In stratified random sampling, or stratification, the strata are formed based on members' shared attributes or characteristics, such as income or educational attainment. Stratified random sampling has numerous applications and benefits, such as studying population demographics and life expectancy.

Stratified sampling is also called proportional random sampling, or quota ________ _______ __________ __________ ____ _____ __________.
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