True or False?    1) Analytical studies use groups as the unit of analysis rather than the individual.   2) John Snow is said to be the first to employ quantitative methods to describe population vital statistics.   3) Descriptive epidemiology refers to studies that are concerned with characterizing the amount and distribution of health and disease within a population.   4) Epidemiology is concerned with the distribution and determinants of health and diseases, morbidity, injuries, disability, and mortality in populations.

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