Source of variation  Sum of squares  Degrees of freedom  Mean sum of squares  Calculated F ratio  F ratio (α = 0.05)  Remark 
Problem size (A)  17,565,288.891  5  3,513,057.778  9.536  2.30  Significant 
Algorithm (B)  6,160,662.029  5  1,232,132.406  2.93  2.30  Significant 
Algorithm × problem size (AB)  10,515,346.157  25  420,613.846  1.141  1.61  Insignificant 
Error  39,787,307.795  108  368,400.998 



Total  74,028,604.872  143 



