Table 3.
Analysis of variance (ANOVA) for NaCl treatment
| Source | df | SS | MS | F value |
|---|---|---|---|---|
| Regression | ||||
| Model | 14 | 601.13 | 42.94 | 6.05 |
| Linear | 4 | 345.17 | 86.29 | 12.15** |
| Quadratic | 4 | 282.07 | 70.51 | 9.93** |
| Cross product | 6 | 34.56 | 5.76 | 0.81ns |
| Residual | 12 | 85.21 | 7.10 | 3.35ns |
| Lack of fit | 10 | 80.41 | 8.04 | |
| Pure error | 2 | 4.81 | 2.40 | |
| Total effect of factors | ||||
| Concentration | 5 | 418.36 | 83.67 | 11.78** |
| Thickness | 5 | 174.44 | 34.88 | 4.91* |
| Amount of NaCl solution | 5 | 29.69 | 5.93 | 0.83ns |
| Time | 5 | 73.86 | 14.77 | 2.08ns |
F Fisher’s ratio; df Degrees of freedom; SS Sum of squares; MS Mean sum of squares; ns not significant; significant at **p ≤ 0.01, *p ≤ 0.05