Give two reasons why we must sometimes use an observational study instead of an experiment.

Name: Give two reasons why we must sometimes use an observational study instead of an experiment.
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Question

Quizplus · Accepted Answer

The Answer is 1) it is unethical or impossible in certain situations to assign people to receive a specific treatment (such as smoking)
2) certain explanatory variables, such as left vs.right handedness, are inherent traits and cannot be randomly assigned.

Give Two Reasons Why We Must Sometimes Use an Observational