A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters be as close as possible to an industry standard. The output from each process is sampled and the average error from the industry standard is calculated. The results are presented below (all are sample data). Process A Process B Mean 0.002 mm 0.0026 mm Standard Deviation 0.0001 mm 0.00012 mm Sample Size 12 14 What are the degrees of freedom