df Sum of Square Mean Square F-value P-value
PFS Regression 5 35.216 7.043 22.25 0.000
Total error 7 2.215 0.3165    
Lack of fit 3 1.482 0.494 2.69 0.181
Pure error 4 0.734 0.183    
PFPD1 Regression 5 2.646 0.529 28.34 0.000
Total error 7 0.131 0.0187    
Lack of fit 3 0.089 0.0296 2.83 0.171
Pure error 4 0.0419 0.0105    
PFPD2 Regression 5 150.297 30.060 36.03 0.000
Total error 7 5.840 0.834    
Lack of fit 3 4.634 1.545 5.12 0.074
Pure error 4 1.206 0.3015    
PFPD3 Regression 5 171.981 34.396 33.00 0.000
Total error 7 7.295 1.042    
Lack of fit 3 2.903 0.968 0.88 0.522
Pure error 4 4.392 1.098    
Table 4: ANOVA results for turbidity removal efficiency.
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