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In a survey of 3068 adults aged 57 through 85 years, it was found that 82.1% of them used at least one prescription medication.

In a survey of 3068 adults aged 57 through 85 years, it was found that 82.1% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3068 subjects used at least one prescription medication? 2519 (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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