Noise levels at 6 airports were measured in decibels yielding the following data: 148,155,177,141,173,141 Construct the 98% 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.

Noise levels at 6 airports were measured in decibels yielding the following data: 148,155,177,141,173,141 Construct the 98% 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.

step 2 : sample standard deviation two decimal places

step 3 find critical value of confidence level round three decimal places

step 4 construct the 98 percent confidence interval round two decimal places

Answer is (required in given question):

155.8

Step-by-step explanation: