The article “Wear in Boundary Lubrication” (S. Hsu, R. Munro, and M. Shen, Journal of Engineering Tribology, 2002:427–441) discusses several experiments involving various lubricants. In one...

The article “Wear in Boundary Lubrication” (S. Hsu, R. Munro, and M. Shen, Journal of Engineering Tribology, 2002:427–441) discusses several experiments involving various lubricants. In one experiment, 45 steel balls lubricated with purified paraffin were subjected to a 40 kg load at 600 rpm for 60 minutes. The average wear, measured by the reduction in diameter, was 673.2 μm, and the standard deviation was 14.9 μm. Assume that the specification for a lubricant is that the mean wear be less than 675 μm. Find the P-value for testing H0 :μ ≥ 675 versus H1 :μ <>