For population-based evaluations, it is highly desirable to have what type of data on members of the population to determine if an intervention effect occurred?

Question

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Baseline data is needed to determine if an intervention effect occurred because it provides a measure of the population's health status before the intervention was implemented. This allows researchers to compare the population's health status before and after the intervention to determine if there was a change.

For Population-Based Evaluations, It Is Highly Desirable to Have What