Social Studies, 21.06.2019 13:30, malachilaurenc

Chris would like to conduct a study on the effectiveness of a new substance-abuse treatment program. he has a sample of participants go through the program and he uses as a comparison group people who did not volunteer for the program but were eligible. chris has used a(n) design for his study.

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Social Studies, 23.06.2019 09:00, Kkampudiaa

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Chris would like to conduct a study on the effectiveness of a new substance-abuse treatment program....