Problem-Solving and Data AnalysisMediumAlternative explanation for an association
Problem-Solving and Data Analysis practice question
A study finds that people who drink more coffee sleep fewer hours. Which of the following is an alternative explanation that the study should consider?
- A. People who sleep less may drink more coffee to stay awake.Correct
- B. Coffee has no effect on anyone.
- C. The people studied do not drink coffee.
- D. Sleep cannot be measured.
Answer: A. People who sleep less may drink more coffee to stay awake.
The cause may run the other way.
Why the other answers are wrong
- B. Coffee has no effect on anyone.
- This denies rather than explains the association.
- C. The people studied do not drink coffee.
- Contradicts the study.
- D. Sleep cannot be measured.
- Sleep was measured.
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