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Table 2 Experimental runs for Plackett – Burman Design

From: Characterization of Actinomycetes and Trichoderma spp. for cellulase production utilizing crude substrates by response surface methodology

Run

A CMC

B WB

C RC

D Peptone

E pH

F MgSO4

G KH2PO4

H*

J*

K*

L*

Response (Activity(IU/ml))

            

Predicted

Actual

1

−1

−1

1

−1

1

1

−1

1

1

1

−1

0.26

0.18

2

1

1

1

−1

−1

−1

1

−1

1

1

−1

0.80

0.88

3

1

−1

1

1

−1

1

1

1

−1

−1

−1

2.40

2.58

4

−1

−1

−1

−1

−1

−1

−1

−1

−1

−1

−1

0.40

0.32

5

1

1

−1

1

1

1

−1

−1

−1

1

−1

0.90

0.94

6

1

1

−1

−1

−1

1

−1

1

1

−1

1

0.60

0.54

7

1

−1

−1

−1

1

−1

1

1

−1

1

1

3.40

3.98

8

1

−1

1

1

1

−1

−1

−1

1

−1

1

3.60

3.2

9

−1

1

−1

1

1

−1

1

1

1

−1

−1

1.40

1.11

10

−1

−1

−1

1

−1

1

1

−1

1

1

1

0.94

0.87

11

−1

1

1

1

−1

−1

−1

1

−1

1

1

0.40

0.38

12

−1

1

1

−1

1

1

1

−1

−1

−1

1

1.30

1.6

  1. *Dummy variables.