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Researchers periodically survey a few thousand of the patients taking a certain medication in order to make
connections between that medication and the subjects' general health. This method of gathering data is classified as
O a census.
O a sample survey.
an experiment.
an observational study.
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Answer :

GinnyAnswer

Final answer:

An observational study involves collecting data without manipulating variables, allowing researchers to analyze relationships. Researchers conducting surveys on patients and medication usage use observational studies to gather insights.


Explanation:

An observational study is a method of collecting data where researchers do not manipulate the independent variable but observe natural occurrences. Through this method, data is gathered without direct intervention, allowing for the analysis of relationships between variables.

For example, in the scenario of researchers investigating the correlation between a medication and general health by surveying patients, they are using an observational study approach to collect information.


Learn more about Observational Studies here:

https://brainly.com/question/37932836


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