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algol13
4 years ago
5

In a study to support drug discovery for patients with lung cancer, patients were divided into 3 groups based on the severity of

the disease. Smoking and alcohol consumption habits were recorded for all 3 groups. Is this an example of an observational study or experimental study
Mathematics
1 answer:
katrin [286]4 years ago
4 0

Answer:

It is an example of an observational study.

Step-by-step explanation:

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