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. 2013 Sep 23;7:160. doi: 10.1186/1752-153X-7-160

Table 2.

Analysis of variance for the fitted quadratic polynomial model of polysaccharides yield

Source
Sum of squares
Degree of freedom
Mean square
F-Value
P-value
          Prob > F
Model
2.94
9
0.33
47.07
<0.0001
X1
1.30
1
1.30
186.60
<0.0001
X2
0.61
1
0.61
87.10
<0.0001
X3
0.49
1
0.49
70.55
<0.0001
X1 X2
0.026
1
0.026
3.69
0.0964
X1 X3
2.5×10-3
1
2.5×10-3
0.36
0.5674
X2 X3
4.0×10-4
1
4.0×10-4
0.058
0.8172
X12
0.060
1
0.060
8.66
0.0216
X22
0.088
1
0.088
12.66
0.0092
X32
0.33
1
0.33
47.36
0.0002
Residual
0.049
7
6.946×10-3
 
 
Lack of Fit
0.032
3
0.011
2.54
0.1944
Pure Error
0.017
4
4.18×10-3
 
 
Cor Total
2.99
16
 
 
 
  R2=0.9837 R2adj=0.9628 CV=2.21%