A computer manufacturer has production lines that utilize three different assembly methods. These methods differ in the order in which tasks are performed and the consequent layout of the production lines. A quality inspector randomly observes 30 computers assembled under each of the three methods and records the assembly times. The resulting data set is given in DS 11.1.6. Is there any evidence that one assembly method is any quicker than the others? Use a computer package to obtain a graphical presentation of the data set, an analysis of variance table, and pairwise comparisons between the different assembly methods.