Table 3. Estimated effects and coefficients for ACE inhibitory activity and pH (coded units) about fermented milk by Lactiplantibacillus plantarum K79
| Variable and interaction | Y1 | Y2 |
| Coefficient | p-value | Coefficient | p-value |
| Intercept | 85.6667 | 0.000 | 5.14667 | 0.000 |
| X1 | 3.5792 | 0.026 | 0.06167 | 0.200 |
| X2 | –0.7542 | 0.601 | –0.02000 | 0.668 |
| X3 | 6.8292 | 0.000 | –0.44417 | 0.000 |
| X4 | 0.3542 | 0.805 | –0.06583 | 0.173 |
| X1X1 | –1.0823 | 0.482 | –0.01896 | 0.701 |
| X2X2 | –1.2823 | 0.407 | –0.07521 | 0.145 |
| X3X3 | –5.0948 | 0.005 | 0.08979 | 0.087 |
| X4X4 | 0.3302 | 0.828 | –0.00646 | 0.896 |
| X1X2 | 0.4313 | 0.806 | 0.00000 | 1.000 |
| X1X3 | –0.4062 | 0.817 | 0.01875 | 0.742 |
| X1X4 | –0.4937 | 0.779 | 0.01250 | 0.826 |
| X2X3 | –1.4313 | 0.422 | 0.12250 | 0.048 |
| X2X4 | –0.8938 | 0.613 | 0.06125 | 0.293 |
| X3X4 | 0.2687 | 0.879 | –0.01500 | 0.792 |
X1, skim milk conc. (%); X2, temperature (°C); X3, incubation time (h); X4, starter conc. (%); Y1, ACE inhibitory activity (%); Y2, pH; ACE, angiotensin converting enzyme.