A small corporation makes insulation shields for electrical wires using three different types of machines. The corporation wants to compare the inside diameter dimension of the shields produced by the machines. A quality engineer at the corporation randomly selects shields produced by each of the machines and records the inside diameters of each shield (in millimeters). The data are given here:

Shield Machine A Machine B Machine C 18.1 8.7 29.7 2.4 56.8 18.7 2.7 4.4 16.5 7.5 8.3 63.7 11.0 5.8 18.9 107.2 19.7 93.4 21.6 17.8