A random sample of 41 glass sheets is obtained and their thicknesses are measured. The sample mean is x- = 3.04 mm and the sample standard deviation is v = 0.124 mm. Construct a 99% two-sided t-interval for the mean glass thickness. Do you think it is plausible that the mean glass thickness is 2.90 mm? (This problem is continued in Problems 8.1.10 and 8.5.12.)