Mathematics, 23.08.2021 21:10, elsabramasco1161

. researchers attempt to reconstruct the conditions that led to a current situation. B. it is difficult to determine the direction of causality unambiguously. C. the same people are observed at multiple points in time. D. a target treatment is compared against an organically inert treatment

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. researchers attempt to reconstruct the conditions that led to a current situation. B. it is diffic...