Table 5 Analysis of variance for yield strength
From: Microstructural and mechanical studies of feedstock material in continuous extrusion process
Sources of variation | Degree of freedom | Square sum | Mean square sum | Fishers test value | p-value |
|---|---|---|---|---|---|
Regression | 5 | 2430.48 | 486.10 | 21.86 | 0.000 |
Linear | 2 | 35.66 | 35.66 | 0.80 | 0.486 |
Square | 2 | 2384.96 | 1192.48 | 53.62 | 0.000 |
Interaction | 1 | 9.86 | 9.86 | 0.44 | 0.527 |
Residual error | 7 | 155.69 | 22.24 | Â | Â |
Lack of fit | 3 | 155.69 | 51.90 | Â | Â |
Pure error | 4 | 0.00 | 0.00 | 0.00 | Â |
Total | 12 | 2586.17 | Â | Â | Â |