v" QUEFI'ION 2.4 The article \"Wear in Boundary Lubrication" [5. Hsur RMunro, and M. Shen. journal of Engineering Topology 2002: 421441} discuses 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 5?3.2pm, and the standard deviation was 14.9 pm. Assume that the specication for a lubricant is that the mean wear be less than GTE pm. Find the P value fortestingHU : p255. versus H? :p