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L 4 (2 3 ) Orthogonal Array
Column
TABLE 18.1
No.
1
2
3
1
1
1
1
2
1
2
2
3
2
1
2
4
2
2
1
TABLE 18.2
L 4 Using “-1” and “ + 1” Level Notation
Column
No.
1
2
3
1
− 1
− 1
− 1
2
− 1
1
1
3
1
− 1
1
4
1
1
− 1
Linear Graph for L 4
3
1
2
FIGURE 18.8
L 4 linear graph.
L 8 (2 7 ) Orthogonal Array
TABLE 18.3
Column
No
1
2
3
4
5
6
7
1
1
1
1
1
1
1
1
2
1
1
1
2
2
2
2
3
1
2
2
1
1
2
2
4
1
2
2
2
2
1
1
5
2
1
2
1
2
1
2
6
2
1
2
2
1
2
1
7
2
2
1
1
2
2
1
8
2
2
1
2
1
1
2
 
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