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What is an observational​ study? What is a designed​ experiment? 1. What is an observational​ study? A. An observational study is a list of all individuals in a population along with certain characteristics of each individual. B. An observational study measures the value of the response variable without attempting to influence the value of either the response or explanatory variables. C. An observational study is when a researcher assigns individuals to a certain​ group, intentionally changing t
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