月份 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 合计 |
预算成本X | 17.9 | 14.2 | 21.9 | 26 | 33.5 | 38.5 | 30 | ∑X=182 |
实际成本Y | 19.8 | 17.4 | 22.2 | 24.5 | 28.9 | 32.3 | 27.1 | ∑Y=172.2 |
X2 | 320.41 | 201.64 | 479.61 | 676 | 1122.25 | 1482.25 | 900 | ∑X2=5182.16 |
XY | 354.42 | 247.08 | 486.18 | 637 | 968.15 | 1243.55 | 813 | ∑XY=4749.38 |