Hospital Noise Levels For a sample of 22 operating rooms taken in a hospital study, the mean noise level was 43.2 decibels, and the standard deviation was 7.3. Find the 91% confidence interval of the...

Hospital Noise LevelsFor a sample of 22 operating rooms taken in a hospital study, the mean noise level was 43.2 decibels, and the standard deviation was 7.3. Find the 91% confidence interval of the true mean of the noise levels in the operating rooms. Assume the variable is normally distributed. Use a graphing calculator and round the answers to at least one decimal place.

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