17. In a dental survey conducted by a county dental health team, 500 adults were asked to...

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17. In a dental survey conducted by a county dental health team, 500 adults were asked to give the reason for their last visit to a dentist. Of the 220 who had less than a high school education, 44 said they went for preventive reasons. Of the remaining 280, who had a high school education or better, 150 stated that they went for preventive reasons.

Construct a 95 percent confidence interval for the difference between the two population proportions.

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