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MMLU / To test whether extensive exercise lowers the resting heart rate, a study is…

Problem

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question

To test whether extensive exercise lowers the resting heart rate, a study is performed by randomly selecting half of a group of volunteers to exercise 1 hour each morning, while the rest are instructed to perform no exercise. Is this study an experiment or an observational study?

choices

  1. An experiment with a control group and blinding
  2. An experiment with blocking
  3. An observational study with comparison and randomization
  4. None of the above

subject

high_school_statistics

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Source and history

Official source

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