Table 9 Regression coefficient values from central composite design experiments for IAA optimisation by endophyte Klebsiella pneumoniae MEBAphS1
Factors | Coefficient (b0-b9 of Eq. 1) | Standard error | t value | p value |
|---|---|---|---|---|
Intercept | 196.48 | 6.39 | 30.74 |  < 0.0001 |
A | 31.83 | 3.75 | 8.488 |  < 0.0001 |
B | 23.73 | 3 | 7.91 |  < 0.0001 |
C | 6.64 | 3.75 | 1.77 | 0.0919 |
AB | 15.64 | 3.92 | 3.989 | 0.0007 |
AC | 1.56 | 3.92 | 0.397 | 0.6942 |
BC |  − 2.76 | 3.92 |  − 0.704 | 0.4891 |
A2 |  − 44.38 | 4.32 |  − 10.273 |  < 0.0001 |
B2 |  − 49.98 | 3.41 |  − 14.656 |  < 0.0001 |
C2 |  − 64.78 | 4.32 |  − 14.995 |  < 0.0001 |