Table 7: The basic data under uncertainty.

Item

1 22.5, 23.75, 26.25, 27.5 5.04, 5.32, 5.88, 6.16 25.2, 26.6, 29.4, 30.8
2 12.6, 13.3, 14.7, 15.4 18.9, 19.95, 22.05, 23.1 31.5, 33.25, 36.75, 38.5
3 18, 19, 21, 22 37.8, 39.9, 44.1, 46.2 36, 38, 42, 44
4 27, 28.5, 31.5, 33 13.5, 14.25, 15.75, 16.5 27, 28.5, 31.5, 33