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MMLU / Which of the following is a true statement?

Problem

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question

Which of the following is a true statement?

choices

  1. While properly designed experiments can strongly suggest cause-and-effect relationships, a complete census is the only way of establishing such a relationship.
  2. If properly designed, observational studies can establish cause-and-effect relationships just as strongly as properly designed experiments.
  3. Controlled experiments are often undertaken later to establish cause-and-effect relationships first suggested by observational studies.
  4. A useful approach to overcome bias in observational studies is to increase the sample size.

subject

high_school_statistics

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