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Table 6 Estimated regression coefficient and corresponding t value and P value

From: Optimization of medium compositions to improve a novel glycoprotein production by Streptomyces kanasenisi ZX01

Factor

Coefficient estimate

Standard error

t value

P value

Intercept

539.66

3.87

–

–

X 1

49.10

2.57

366.11

<0.0001

X 2

24.54

2.57

91.44

<0.0001

X 3

12.58

2.57

24.04

0.0006

X 1 X 2

−2.83

3.35

0.71

0.4184

X 1 X 3

6.93

3.35

4.27

0.0658

X 2 X 3

10.66

3.35

10.11

0.0098

X 21

−22.24

2.50

79.25

<0.0001

X 22

−13.90

2.50

30.96

0.0002

X 23

−14.94

2.50

35.76

0.0001

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