Suppose a book publisher obtains survey results from a simple random sample of 1,000 customers drawn from the population of all customers of a certain bookstore. In the survey, 325 customers said they preferred ebooks when reading for fun. (The others said they preferred traditional print books.) The percentage of all customers of this bookstore that say they prefer ebooks is estimated to be 32.5%. What margin of error yields an approximate 95% confidence interval?

32.5% ____%

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