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Table 3 Student test of the different terms suggested for the essential oil extraction yield model

From: Lawsonia inermis essential oil: extraction optimization by RSM, antioxidant activity, lipid peroxydation and antiproliferative effects

FactorCoefficientStandard Errortp
Constant2.9650.07340.569< 0.0001
x12.2780.090 25.450< 0.0001
x20.8580.0909.590< 0.001
x30.0800.0900.8940.412
x120.7820.06611.875< 0.0001
x220.0290.0660.4460.674
x320.0470.0660.7070.511
x1 × x20.0890.1270.7030.513
x1 × x30.0920.1270.7270.500
x2 × x30.0350.1270.2770.793