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Cahen, Leonard S.; And Others – 1970
The accuracy of estimating test means for groups of twelfth-grade students by the item-sampling technique was examined. The subjects were from 35 twelfth-grade schools participating in the National Longitudinal Study of Mathematical Abilities. Half of the students in each school were assigned to a treatment condition where they took a complete…
Descriptors: Academic Achievement, Analysis of Variance, Comparative Analysis, Comparative Testing