A machine shop manufactures ball bearings with a diameter of 15 mm. However, the diameter of the ball bearings varies slightly. To check that the manufacturing process is operating correctly, a random sample of 25 ball bearings is selected. The mean diameter is 15.015 mm with a standard deviation of 0.055 mm. From these summary values, a 90% confidence interval for μ, the true mean diameter of all ball bearings, is constructed. Assume that the distribution of the diameters is approximately normal.3. What is the upper bound for the 90% confidence interval for μ? Enter the answer using 4 decimals.
