Noise Levels At 5 Construction Sites Were Measured In Decibels Yielding The Foll

Noise levels at 5 construction sites were measured in decibels yielding the following data:


Construct the 99% confidence interval for the mean noise level at such locations. Assume the population is approximately normal.

Step 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place

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