Noise levels at 6 manufacturing plants were measured in decibels yielding the following data: 132. 148, 139, 105, 126, 118 Construct the 95% confidence interval for the mean noise level at such locations. Assume the population is approximately normal, Step 4 of 4 : Construct the 95% confidence interval, Round your answer to one decimal place Answer How to enter your answer Tables Keyboa Previous Lower endpoint Upper endpoint Subi