Which of the following are impediments to implementing the RCT described above? Select all that apply. "It is unethical to require some students to study less than others, especially if studying is believed to improve test scores." It may be practically infeasible to require some students to study more than others. "The professor may be able to force some students to study more, but the quality of those students studying may be lower." ItÕs impossible to randomize students to two groups. QUESTION 6 "Now suppose that Hunter College started paying students to study in September 2019, but did not pay students to study in 2018 (note this policy has never been implemented to my knowledge, so you are not missing out). The professor wants to use this quasi-experiment to answer her research question. She plans to compare microeconomic exam test scores for the 2019 student cohort to the microeconomic exam test scores for the 2018 student cohort to figure out if studying more leads to higher test scores. What must be true about this policy for it to qualify as an ideal quasi-experiment? Select all that apply." O The 2019 student cohort should have studied more for microeconomic exams than the 2018 student cohort. The average characteristics (except for study time) should be statistically the same for the 2019 student cohort as the 2018 student cohort. "Hunter College should not have implemented the policy in response to the 2018 student cohort?s particularly low or high microeconomic exam test scores, relative to past cohorts." The money the students earned for studying in 2019 should have been spent on non-academic related activities or resources. O The same number of students enrolled in microeconomics courses in 2018 and 2019. QUESTION 7 What type of data did the professor collect as part of her quasi-experiment? Select all that apply. O Observational data Experimental data Cross section data Time series data Panel data

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