Open Access
Review

Table 4

Initial ANOVA for fatigue strength.

Source DF Sum of squares Mean Squares F-Value P-Value Decision
Model 14 66.6498 4.7607 37.21 0.000 Statistically significant
A 1 2.2126 2.2126 17.29 0.001 Statistically significant
B 1 13.3056 13.3056 104.00 0.000 Statistically significant
C 1 5.1745 5.1745 40.44 0.000 Statistically significant
D 1 0.5134 0.5134 4.01 0.065 Negligibly small
A*A 1 0.0090 0.0090 0.07 0.795 Negligibly small
B*B 1 3.0281 3.0281 23.67 0.000 Statistically significant
C*C 1 24.7528 24.7528 193.47 0.000 Statistically significant
D*D 1 0.5034 0.5034 3.93 0.067 Negligibly small
A*B 1 2.3661 2.3661 18.49 0.001 Statistically significant
A*C 1 4.6010 4.6010 35.96 0.000 Statistically significant
A*D 1 0.2141 0.2141 1.67 0.217 Negligibly small
B*C 1 0.7140 0.7140 5.58 0.033 Statistically significant
B*D 1 0.8100 0.8100 6.33 0.025 Statistically significant
C*D 1 1.3924 1.3924 10.88 0.005 Statistically significant
Error 14 1.7912 0.1279     Negligibly small
Lack-of-Fit 10 1.3235 0.1323 1.13 0.492 Statistically significant
Pure Error 4 0.4677 0.1169      
Total 28 68.4410