X1 X2 X1 X2 X12 X22 Y1
-1 1 -1 1 1 119
0 1 0 0 1 58
1 1 1 1 1 26
-1 0 0 1 0 69
0 0 0 0 0 24
1 0 0 1 0 8
-1 -1 1 1 1 45
0 -1 0 0 1 25
1 -1 -1 1 1 15
Table 15: Multiple regression analysis for response factor y1 (Disintegration time).