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Suppose the salaries of 61 police officers among 203 police officers in an eastern state and 81 police officers among 245 police officers in a

Suppose the salaries of 61 police officers among 203 police officers in an eastern state and 81 police officers among 245 police officers in a northern state were over $100,000. Question: Find the upper bound of a 95% confidence interval for the difference in proportions over $100,000 salaries between the two groups.

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