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A researcher wants to study the effect of a new study technique on student test scores. She pairs 30 students by baseline ability and randomly assigns one from each pair to use the new technique while the other uses the standard technique. This is an example of which design?
A researcher wants to study the effect of a new study technique on student test scores. She pairs 30 students by baseline ability and randomly assigns one from each pair to use the new technique while the other uses the standard technique. This is an example of which design?