A recent survey reported that in a sample of 400 students who attend two-year colleges, 108 work at least 20 hours a week. In a sample of 200 students

A recent survey reported that in a sample of 400 students who attend two-year colleges, 108 work at least 20 hours a week. In a sample of 200 students attending private universities, 24 students work at least 20 hours a week. What is the 95% confidence interval for the difference of the two proportions?

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