Question: Should I take the class? A college allows students to choose either classroom or self-paced instruction in a basic economics course. Th e college wants

Should I take the class? A college allows students to choose either classroom or self-paced instruction in a basic economics course. Th e college wants to compare the eff ectiveness of self-paced and regular instruction. A professor proposes giving the same fi nal exam to all students in both versions of the course and comparing the average score of those who took the self-paced option with the average score of students in the regular sections.

(a) Explain why confounding would make the results of this study worthless.

(b) Given 30 students who are willing to use either regular or self-paced instruction, outline an experimental design to compare the two methods of instruction. Th en use Table B, starting at line 108, to carry out the randomization.

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