| Source of variation |
DF1) |
Sum of squares |
Mean square |
F-value |
p-value |
| The model for biomass production (Y1)2) |
| Regression |
9 |
1.98 |
0.22 |
89.59 |
0 |
| Linear |
3 |
0.38 |
0.16 |
66.86 |
0 |
| Square |
3 |
1.53 |
0.51 |
207.81 |
0 |
| Interaction |
3 |
0.07 |
0.02 |
8.97 |
0.003 |
| Residual error |
10 |
0.02 |
0 |
|
|
| Lack-of-fit |
5 |
0.02 |
0 |
72.6 |
0 |
| Pure error |
5 |
0 |
0 |
|
|
| Total |
19 |
2 |
|
|
|
| Model terms |
Coefficient |
DF |
Standard error |
t-value |
p-value |
| Intercept |
-4.75 |
1 |
0.38 |
-12.62 |
0 |
| x1 (temperature) |
0.11 |
1 |
0.01 |
10.37 |
0 |
| x2 (pH) |
0.85 |
1 |
0.07 |
12.51 |
0 |
| x3 (salinity) |
0.06 |
1 |
0.01 |
4.66 |
0.001 |
| x12 (temperature * temperature) |
-0.002 |
1 |
0 |
-16.47 |
0 |
| x22 (pH * pH) |
-0.07 |
1 |
0.004 |
-16.2 |
0 |
| x32 (salinity * salinity) |
-0.003 |
1 |
0 |
-14.56 |
0 |
| x1 x2 (temperature * pH) |
0.001 |
1 |
0 |
1.43 |
0.184 |
| x1 x3 (temperature * salinity) |
0 |
1 |
0 |
1.14 |
0.28 |
| x2 x3 (pH * salinity) |
0.006 |
1 |
0.001 |
4.85 |
0.001 |
|
| 1) Degree of freedom |
| 2) R2=98.77% and adjusted R2 (R2 adj)=97.67% |
| Table 2: Analysis of variance (ANOVA) for biomass production by Halorubrum sp.TBZ126. |
