Mathematics, 07.03.2020 05:32, brandiwingard

What is an observational study?
A) An observational study is a list of all individuals in a population along with a certain characteristics of each individual.
B) An observational study is whn a researcher assigns individuals to a certain group, intentionally changing the value of an explanatory variable, and then recording the value of the responses variable for each.
C) An observational study measures the value of the response variable without attempting the influence the value of either the response or explanatory variables

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What is an observational study?
A) An observational study is a list of all individuals in a p...