Question: 10 (0.5 points) Randomized experiments are easy to conduct in the field and always viewed as ethical. True False Question 11 (0.5 points) Tampering with

10 (0.5 points) Randomized experiments are easy to conduct in the field and always viewed as ethical. True False Question 11 (0.5 points) Tampering with randomization is a potential threat to internal validity for quasi- experimental designs. True False Question 12 (1 point) Which statement below is not a strategy for achieving "control" in randomized control trials? Choose one answer. Maximizing external validity O Minimizing attrition O Optimizing group equivalence Avoiding contamination

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