Range and Levels

Variables

−α (1.681)

Low (−1)

Central (0)

High (1)

+α (1.681)

X1 (OLR)

1

2.6

6

11

14.409

X2 (C/N)

13.182

20

30

40

46.817

X3 (HRT)

1.954

4

7

10

12.045