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A headline in a major newspaper read, "Breast-fed youth found to do better in school."

a. Do you think this statement was based on an observational study or a randomized experiment? Explain.

b. Given your answer in part (a), which of these two alternative headlines do you think would be preferable: "Breast-feeding leads to better school performance" or "Link found between breast-feeding and school performance"? Explain.

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