Research Article
The Application of Response Surface Methodology in the Investigation of the Tribological Behavior of Palm Cooking Oil Blended in Engine Oil
Table 9
Analysis of variance for wear rate.
| Source | DF | Seq SS | Adj SS | Adj MS | value | value |
| Regression | 9 | 0.456675 | 0.456675 | 0.009888 | 173.19 | 0.000 | Linear | 3 | 0.198500 | 0.198500 | 0.024624 | 431.29 | 0.000 | Square | 3 | 0.236568 | 0.236568 | 0.005015 | 87.84 | 0.000 | Interaction | 3 | 0.021607 | 0.000073 | 0.000024 | 0.43 | 0.742 | Residual error | 5 | 0.054272 | 0.000285 | 0.000057 | | | Lack of fit | 3 | 0.051876 | 0.000285 | 0.000095 | 6486.86 | 0.000 | Pure error | 2 | 0.002396 | 0.000000 | 0.000000 | | | Total | 14 | 0.510947 | | | | |
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= 0.0330377, PRESS = , = 95.99%, (pred) = %, and (adj) = 83.96%.
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