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21-11-2022
Mathematics

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Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 163 ward
areas was 54.4 decibels, and the population standard deviation is 4.8. Find the 90% confidence interval of the true mean. Round
your answers to at least one decimal place.
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Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels The mean noise level in 163 ward areas was 544 decibels and the pop class=

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