A group of do-gooder college students believes that herbal tea has remarkable powers. To test this belief, they make weekly visits to a local nursing home, visiting with the residents and serving them herb tea. The nursing home staff reports that after several months many of the residents are more cheerful and healthy. A dour professor scoffs at the idea that herb tea helped the residents. It's all confounding, says the professor.
(a) Identify the treatment and outcome/response variables in this study.
(b) What sort of confounding might the professor have in mind?
The question belongs to Statistics and it discusses about the effects of herbal tea offering any health benefits to a nursing home residents.
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