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Noise levels at various urban hospitals were measured in decibels. The mean noise level in 162 ward areas was 51.5 decibels, and the population standard
Noise levels at various urban hospitals were measured in decibels. The mean noise level in 162 ward areas was 51.5 decibels, and the population standard deviation is 4.5. Find the 90% confidence interval of the true mean. Round your answers to at least one decimal place. ____ < u < ____
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Calculus Early Transcendentals
Authors: James Stewart
8th edition
1285741552, 9781305482463 , 978-1285741550
