In which type of statistical study is the population influenced by researchers?

A. Researchers do not influence the population in any of the statistical studies.
B. Observational study
C. Survey
D. Experiment



Answer :

Final answer:

Observational studies involve measuring characteristics in a sample without researcher influence.


Explanation:

Observational studies are a type of nonexperimental scientific investigation where researchers measure characteristics in a sample without manipulating variables. In this type of study, the population is not influenced by researchers. For example, a political poll collecting data from adults without manipulating their opinions is an observational study.


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