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Table 5 Significance test of regression coefficient of the central composition experiment

From: A newly isolated Bacillus licheniformisstrain thermophilically produces 2,3-butanediol, a platform and fuel bio-chemical

Variable

Coefficient

Standard error

T-value

P-value

Intercept

41.8017

0.5181

80.6810

0.0002

X 1

0.3089

−0.3440

0.8979

0.3903

X 2

−0.3078

−0.3440

−0.8946

0.3920

X 3

1.5652

−0.3440

4.5496

0.0010 a

X 1 2

−1.9426

−0.3440

−5.8005

0.0002 a

X 1 X 2

−1.2662

0.4495

−2.8170

0.0182 a

X 1 X 3

0.1538

0.4495

0.3420

0.7394

X 2 2

−2.8194

0.3349

−8.4185

0.0001 a

X 2 X 3

−0.3888

0.4495

−0.8649

0.4074

X 3 2

−1.8012

0.3349

−5.3782

0.0003 a

  1. R2 = 0.9350, R2 (Adj) = 0.8766.
  2. a Statistically significant at 95% of confidence level (p < 0.05).
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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