We want to compare three groups of workers working in the field of machining and manufacturing of mechanical parts with regard to the results of a shape perception test. The results obtained from a random sample of 10 workers from each group are presented below: Group1 Group 2 Group 3 79 83 81 75 89 78 79 83 97 89 93 90 88 92 89 83 87 85 67 82 74 98 104 81 82 86 84 70 71 81 Knowing that SCres = 1830, determine the residual mean square