Which of the following observes a comparison between two independent samples? Th

Question

Which of the following observes a comparison between two independent samples? The comparison between performance on a board certification exam prior to, and post implementation of a new preparation program among a group of surgeons. Determination if a SRS of children in a classroom is performing up to a particular level on a new standardized exam. Observing the difference in fasting glucose levels between a group of individuals receiving a new study drug and a group receiving a placebo. None of the above.

Explanation / Answer

Answer. Option C. Observing the difference in fasting glucose levels between a group of individuals receiving a new study drug and a group receiving a placebo.

Option A has the same participants in the prior and post comparison and therefore is not independent

Option B has students from the same classroom and therefore is not independent

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