Table 4 ANOVA for response surface quadratic model
Source | Sum of squares | Df | Mean square | F value | p value Prob > F |
|---|---|---|---|---|---|
Model | 9521.10 | 9 | 1057.90 | 63.22 | <0.0001 |
A-sea salt | 6862.20 | 1 | 6862.20 | 410.08 | <0.0001 |
B-pH | 510.19 | 1 | 510.19 | 30.49 | 0.0009 |
C-temp | 180.50 | 1 | 180.50 | 10.79 | 0.0134 |
AB | 306.25 | 1 | 306.25 | 18.30 | 0.0037 |
AC | 37.08 | 1 | 37.08 | 2.22 | 0.1802 |
BC | 128.53 | 1 | 128.53 | 7.68 | 0.0276 |
A2 | 350.59 | 1 | 350.59 | 20.95 | 0.0026 |
B2 | 213.75 | 1 | 213.75 | 12.77 | 0.0090 |
C2 | 366.31 | 1 | 366.31 | 21.89 | 0.0023 |
Lack of fit | 117.14 | 3 | 39.05 | ||
Std. dev. | 4.09 | R-squared | 0.9878 | ||
Mean | 272.47 | Adj R-squared | 0.9722 | ||
C.V. % | 1.50 | Pred R-squared | 0.8002 | ||
PRESS | 1925.58 | Adeq precision | 26.350 | ||