Problem 15 of 7
Identify whether study randomly assign diets to participants is observational.
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recognize observation of existing conditions without imposed treatment.
Hidden until you reveal it.
Recognize observation of existing conditions without imposed treatment.
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Walkthrough
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1. Identify whether researchers impose a treatment.
2. If they only observe existing variables, classify as observational.
3. Note limits on causal conclusions.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Causal-experiment language for existing-group comparisons.