The difference between an experiment and an observational study is:
A.
An observational study tries to gather information without interfering; an experiment looks to actively impose a treatment to see how they respond.
B.
An experiment tries not to change behavior, an observational study does.
C.
An experiment deliberately imposes a treatment whereas an observational study measures the unintentional effects of the treatment as a result of the observation being done.
Answer: A.
An observational study tries to gather information without interfering; an experiment looks to actively impose a treatment to see how they respond.
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