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question 1 Find the indicated margin of error. 1) In a survey of 280 adults over 50, 75% said they were taking vitamin 1) supplements.

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Find the indicated margin of error. 1) In a survey of 280 adults over 50, 75% said they were taking vitamin 1) supplements. Find the margin of error for the 9% confidence interval used to estimate the population proportion. Give your answer as a percentage. A) 13.3% B) 10.1% C) 5.07% D) 6.66% E) 18.6%

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