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5. In the lectures we discussed Project STAR, in which students were randomly assigned to classes of di'erent size. Suppose that there was anecdotal evidence
5. In the lectures we discussed Project STAR, in which students were randomly assigned to classes of di'erent size. Suppose that there was anecdotal evidence that school principals were successfully pressured by some parents to place their children in the small classes. How would this compromise the internal validity of the study? Suppose that you had data on the original random assignment of each student before the principal's intervention (as well as the classes in which students were actually enrolled). How could you use this information to restore the internal validity of the study
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