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Table 2 Experimental matrix for the factorial design and center points

From: Bioethanol production from rice straw by popping pretreatment

Run

Coded values

Reducing sugar (mg/mL)

 

x 1

x 2

Experimental

1

-1

1

5.132

2

1

-1

5.716

3

-1

-1

4.897

4

-2

0

2.902

5

0

2

5.309

6

0

-2

5.088

7

0

0

5.807

8

0

0

5.667

9

2

0

5.444

10

1

1

5.601

11

0

0

5.717