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From a large number of actuarial exam scores, arandom sampleof375scores is selected, and it is found that270of these375are passing scores. Based on this sample, find

From a large number of actuarial exam scores, arandom sampleof375scores is selected, and it is found that270of these375are passing scores. Based on this sample, find a90%confidence intervalfor theproportion of all scores that are passing.

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