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Table 5 Regression coefficients, R2 values and ANOVA results for the multiple linear regression models

From: The development of an herbal material quality control strategy considering the effects of manufacturing processes

Process parameters Y1(Rd purity) Y2(Total saponin purity)
Coefficient p value Coefficient p value
Constant − 0.12   0.76  
X1 3.382 × 10−4 0.0394* 2.203 × 10−3 0.0056**
X9 1.824 × 10−3 < 0.0001**   
X10 1.869 × 10−4 < 0.0001**   
Z1    0.0103 0.0143*
Z2    5.291 × 10−3 0.0023**
Z4    − 0.0111 < 0.0001**
Z5 3.971 × 10−3 < 0.0001**   
Z6 − 8.607 × 10−5 < 0.0001**   
Model p value < 0.0001 < 0.0001
R2 0.9348 0.7460
\( {\text{R}}^{ 2}_{\text{adj}} \) 0.9223 0.7083
  1. * p < 0.05
  2. ** p < 0.01