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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)