4b)
t y t2 ty n = 12
1 135 1 135 Σt = 78
2 136 4 272 Σy = 2432
3 180 9 540 Σt2 = 650
4 169 16 676
5 210 25 1050 Σty = 17251
6 205 36 1230
7 225 49 1575
8 217 64 1736 SKtt = 143,00
9 245 81 2205
10 227 100 2270 SPty = 1443,00
11 234 121 2574
12 249 144 2988 b1 = 10,09
b0 = 137,08
2007 = 268,2576