The difference between an observational study and an experiment is that?

in an observational study, only one group is studied, and in an experiment, two groups are studied.

in an observational study, the researchers do not control treatment, and in an experiment, they do.

in an experiment, cause-and-effect is analyzed, and in an observational study, it is not.

in an experiment, one group is studied over a short period of time, and in an observational study, the group is studied over a longer period of time.

Question

Emilio Dickerson

Mathematics

25 January, 11:27

The difference between an observational study and an experiment is that?

in an observational study, only one group is studied, and in an experiment, two groups are studied.

in an observational study, the researchers do not control treatment, and in an experiment, they do.

in an experiment, cause-and-effect is analyzed, and in an observational study, it is not.

in an experiment, one group is studied over a short period of time, and in an observational study, the group is studied over a longer period of time.

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Answers (1)

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Amari Mendoza · Answer 1

The obvious difference between observational study and an experiment is that the observational study only "observes" the phenomenon without manipulating the variable themselves. However, when it is an experiment, you have to control these variables in order to determine the influence of it to the given phenomenon.