Table 4 Variance analysis of the response surface for the energy loss coefficient.
From: Analysis of energy loss in the helical hedge flow channel of fruit tree root emitter
Source | Sum of squares | Degrees of freedom | Mean square | F value | P value |
|---|---|---|---|---|---|
Model | 43,111.03 | 9 | 4790.11 | 24.42 | 0.0002** |
A-α | 10,828.11 | 1 | 10,828.11 | 55.19 | 0.0001** |
B-b | 2738.14 | 1 | 2738.14 | 13.96 | 0.0073** |
C-n | 24,029.5 | 1 | 24,029.5 | 122.48 | < 0.0001** |
AB | 307 | 1 | 307 | 1.56 | 0.2511 |
AC | 3107.74 | 1 | 3107.74 | 15.84 | 0.0053** |
BC | 1010.19 | 1 | 1010.19 | 5.15 | 0.0575 |
A2 | 715.74 | 1 | 715.74 | 3.65 | 0.0978 |
B2 | 402.88 | 1 | 402.88 | 2.05 | 0.195 |
C2 | 21.58 | 1 | 21.58 | 0.11 | 0.7499 |
Residual | 1373.33 | 7 | 196.19 | – | – |
Lack of fit | 1372.18 | 3 | 457.39 | 1590.55 | < 0.0001 |
Pure error | 1.15 | 4 | 0.2876 | – | – |
Cor Total | 44,484.37 | 16 | – | – | – |
