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More dogs are being diagnosed with thyroid problems than have been diagnosed in the past. A researcher identified 50 puppies without thyroid problems and kept records of their diets for several years to see if any developed thyroid problems. This is a(n)

▸ prospective study

▸ retrospective study

▸ randomized experiment

▸ survey

▸ blocked experiment
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Stats: Modeling the World


Edition: 4th
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prospective study
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