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Representative samples are designed to reflect characteristics or qualities present in the population and are important for accurate research. Representative samples are designed to reflect characteristics or qualities present in the population and are important for accurate research.
Lesson Summary. A matched-pairs design is a type of randomized block design that has two treatment conditions and pairs subjects based on common variables. A block design is one in which an experimenter distributes the subjects of a study into smaller subgroups that have common variables.