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Table 3 Estimated coefficients of the fitted quadratic polynomial equation for different responses based on t-statistic

From: Production optimization of flying fish roe analogs using calcium alginate hydrogel beads

Parameter

Y (sphericity, %)

Coefficient

P value

Constant

97.80

0.000

X 1

4.89

0.000

X 2

1.51

0.018

X 3

0.27

0.633

X 4

−1.40

0.026

X 1 X 1

−3.76

0.000

X 2 X 2

−0.94

0.133

X 3 X 3

−2.42

0.001

X 4 X 4

−1.57

0.020

X 1 X 2

−0.88

0.217

X 1 X 3

0.01

0.993

X 1 X 4

0.82

0.249

X 2 X 3

0.33

0.633

X 2 X 4

−0.63

0.369

X 3 X 4

0.93

0.194

  1. Y (sphericity, %), X 1 (sodium alginate concentration, %), X 2 (curing time in calcium chloride solution, min), X 3 (calcium chloride concentration, %), X 4 (rotation speed of calcium chloride, ×g)