why isn't the question at 11:20 considered an ecologic study? Since it is comparing 2 populations (city A & city B) and both study designs have the potential to find the prevalence and correlation. I don't get the difference between cross-sectional and ecologic study at this particular Q. kindly clarifyy :)
why isn't the question at 11:20 considered an ecologic study? Since it is comparing 2 populations (city A & city B) and both study designs have the potential to find the prevalence and correlation. I don't get the difference between cross-sectional and ecologic study at this particular Q. kindly clarifyy :)
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Thank you 🙏