Problem-Solving and Data AnalysisMediumWhat an observational finding supports
Problem-Solving and Data Analysis practice question
A study of 4,000 adults finds that those who drink tea daily report better sleep than those who do not. Which conclusion is best supported?
- A. Among the adults studied, daily tea drinking is associated with better reported sleep.Correct
- B. Drinking tea causes better sleep.
- C. Avoiding tea causes poor sleep.
- D. Everyone should drink tea daily.
Answer: A. Among the adults studied, daily tea drinking is associated with better reported sleep.
An observational study shows association, not cause.
Why the other answers are wrong
- B. Drinking tea causes better sleep.
- Cause needs random assignment.
- C. Avoiding tea causes poor sleep.
- Same problem, reversed.
- D. Everyone should drink tea daily.
- A recommendation goes beyond an association.
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