A survey was given to a randorn sample of voters in the United States to ask about their preference for a presidential candidate. The percentage of people who said they preferred Candidate A was 55 %. The margin of error for the survey was 3.5 %. Write a confidence interval for the percentage of the population that supports Candidate A.

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Step:1 ：Given percentage: (55%) and margin of error: (3.5%)Step:2 ：Calculate lower bound: (55 - 3.5 = 51.5%)Step:3 ：Calculate upper bound: (55 + 3.5 = 58.5%)Step:4 ：(boxed{Confidence Interval: (51.5%, 58.5%)})

Answer

Step: 1 ：Given percentage: (55%) and margin of error: (3.5%)Step: 2 ：Calculate lower bound: (55 - 3.5 = 51.5%)Step: 3 ：Calculate upper bound: (55 + 3.5 = 58.5%)Step: 4 ：(boxed{Confidence Interval: (51.5%, 58.5%)})

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