In a survey of 3159 adults aged 57 through 85 years, it was found that 87.6% of them used at least one prescription medication. Complete parts (a) through (b) below. O a. How many of the 3159 subjects used at least one prescription medication? (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. %

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