The maximum bending stress in a round bar in flexure occurs in the outer surface and is

Question:

The maximum bending stress in a round bar in flexure occurs in the outer surface and is given by the equation If the moment is specified as M ~ (15 000,1350) lbf ?in and the diameter is d ~ (2.00,0.005) in, find the mean, the standard deviation, and the coefficient of variation of the corresponding stress in psi.