Problem 9.16 In a comparison study of two processes for manufacturing steel plates each plate is classified into one of three categories: no defects, minor defects, major defects. The results of the study are displayed in the following 2 × 3 contingency table.

Process No defects Minor defects Major defects A 40 10 5 B 35 12 8 Test the hypothesis that there is no difference between the two processes; use α = 0.01.