Dr. Dow Jones wants to know whether a problem-based approach to teaching economics will result in higher academic performance than

Dr. Dow Jones wants to know whether a problem-based approach to teaching economics will result in higher academic performance than his traditional method. Of the six sections of Economics 101 at his university, Dr. Jones randomly assigns three sections to the traditional method and three sections to the problem-based method. At the end of the semester, all students complete the same final exam. In this design, students studying under the traditional method constitute the:_____________
a) placebo group.
b) treatment group.
c) sample.
d) control group.

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