Source of Variation
Degree of freedom
Sum of
squares
Mean
Square
F-value
p-value
For 24 h
Regression Model
9
170.03
18.89
7.95
0.002
Residual
10
23.77
2.38
Total
19
193.80
Lack of fit
5
8.44
1.69
0.55
0.736
Pure Error
5
15.33
3.07
Summary of fit
R2 = 0.877
For 48 h
Regression Model
9
214.13
23.79
12.64
0.000
Residual
10
18.82
1.88
Total
19
232.95
Lack of fit
5
5.98
1.20
0.47
0.789
Pure Error
5
12.83
2.57
Summary of fit
R2 = 0.919
For 72 h
Regression Model
9
92.73
10.30
3.67
0.027
Residual
10
28.07
2.81
Total
19
120.80
Lack of fit
5
22.57
4.51
4.10
0.074
Pure Error
5
5.50
1.10
Summary of fit
R2 = 0.768
