Run

A

B

C

D = A*B

1

-1

1

1

1

2

1

-1

-1

-1

3

-1

1

-1

-1

4

1

1

-1

1

5

-1

-1

1

1

6

1

-1

1

-1

7

-1

1

1

-1

8

1

1

1

1

Central Point

0

0

0

0

Central Point

0

0

0

0

Central Point

0

0

0

0

Table 2: Experimental design matrix for the 24-1 plan developed for independent factors analyzed in the PG extraction.