Question: 11.18. Verify that the central composite design shown in Table P11.8 blocks orthogonally: Block 1 Block 2 X1 x2 X3 x1 x2 X3 0 0
11.18. Verify that the central composite design shown in Table P11.8 blocks orthogonally:

Block 1 Block 2 X1 x2 X3 x1 x2 X3 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 -1 Block 3 x1 x2 X3 -1.633 0 0 1.633 0 0 0 -1.633 0 0 1.633 0 0 0 -1.633 0 0 1.633 0 0 0 0 0 0
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