Question

Which of the following questions could be answered by an experimental study?(1 point)
Responses

How do different sleep patterns affect cognitive performance in adults?
How do different sleep patterns affect cognitive performance in adults?

How do birds migrate across continents during different seasons?
How do birds migrate across continents during different seasons?

What are the typical commuting habits of people living in inner-city areas?
What are the typical commuting habits of people living in inner-city areas?

What is the relationship between exercise frequency and heart disease in a population?
What is the relationship between exercise frequency and heart disease in a population?
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Answer 1

Answers:
- How do different sleep patterns affect cognitive performance in adults? — Yes. You can manipulate sleep schedules (different durations/timing) and measure cognitive performance in a randomized/controlled experiment.
- What is the relationship between exercise frequency and heart disease in a population? — Potentially yes. You can run an exercise-intervention randomized controlled trial to vary exercise frequency and observe cardiovascular outcomes (though it may be long-term or practically/ethically challenging).

The other two (bird migration across continents; typical commuting habits of inner-city residents) are mainly addressed with observational/descriptive studies (tracking, surveys), not by controlled experiments.