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need within 15min a Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 166 ward

need within 15min

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a Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 166 ward areas was 56.9 decibels, and the population standard deviation is 5.3. Find the 99% confidence interval of the true mean. Round your answers to at least one decimal place. X Undo

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