Noise levels at 5 construction sites were measured in decibels yielding the following data: 179,166,143,183,146 Construct the 99% confidence interval...

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

179,166,143,183,146

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