Which of the following aspects of good experimental design is the one that observational studies are unable to provide?

Question

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Randomization is a key aspect of experimental design that observational studies cannot provide. Randomization helps to ensure that any differences observed between groups in an experiment can be attributed to the treatment effect rather than to preexisting differences between the groups. Observational studies, by contrast, do not involve the researcher controlling the assignment of treatments, so they cannot ensure this balance through randomization.

Which of the Following Aspects of Good Experimental Design Is