reenville County, South Carolina, has 396,183 adult residents, of which 80,987 are 65 years or older. A survey wants to contact ?=689 residents. If repeated simple random samples of 689 residents are taken, what would be the range of the sample proportion of adults over 65 in the sample according to the 95 part of the 68-95-99.7 rule? Give your answers to four decimal places. lower bound:     upper bound:

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