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Table 4

ANOVA results for thrust force.

Source Degree of freedom Sum of squares Mean square f-value p-value
Regression 9 427676 47519.5 103.01 0.000
Residual error 17 7842 461.3    
Total 26 435518      

R-sq (adj) = 97.25%

Term PE coefficient SE coefficient t-value p-value

Constant 238 295 0.81 0.432
D 79.5 46.1 1.73 0.102
Vc −0.21 1.06 −0.19 0.848
f −4797 1557 −3.08 0.007
D 2 −5.52 2.19 −2.52 0.022
Vc 2 −0.00451 0.00351 −1.29 0.215
f 2 9883 3507 2.82 0.012
D × Vc 0.20 0.062 3.23 0.005
D × f 301.6 62.0 4.86 0.000
Vc × f −0.56 2.48 −0.22 0.825

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