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.
Solution
Step 1 :Given percentage: \(55%\) and margin of error: \(3.5%\)