Determine whether the description corresponds to an observational study or an experiment. Research is conducted to determine if there is a relation between Parkinson's disease and childhood head trauma. ..... Does the description correspond to an observational study or an experiment? Experiment Observational study

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A: To calculate a one-proportion test or confidence interval, certain assumptions must be satisfied.…

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A: Given that:  Population mean

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A: The question asked for the function f or ft. The last line was the answer.

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