Results of multiple regression analyses to predict force at the block (FB) and tension in the rope (T) for Pieces and Tops. Estimate refers to either the intercept or the regression coefficient (slope) for each parameter in the model, SE is standard error of the estimate, and contribution to model is the percentage of the overall sum of squares contributed by the parameter.
| Variable | Pieces | Tops | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FB (R2 = 0.78, P < 0.0001) | T (R2 = 0.71, P < 0.0001) | FB (R2 = 0.96, P < 0.0001) | T (R2 = 0.91, P = 0.0003) | |||||||||
| Variable | Estimate (SE) | P | Contribution to model | Estimate (SE) | P | Contribution to model | Estimate (SE) | P | Contribution to model | Estimate (SE) | P | Contribution to model |
| Intercept | 4,815 (3,439) | 0.1684 | −1,354 (1,955) | 0.4922 | 5,088 (3,681) | 0.2094 | 3,294 (2,165) | 0.1720 | ||||
| Mass | 84.6 (6.71) | 0.0001 | 77.6 | 36.8 (3.81) | 0.0001 | 69.3 | 59.3 (4.63) | 0.0001 | 94.0 | 24.0 (2.73) | 0.0001 | 88.6 |
| Fall distance | −633 (1,029) | 0.5420 | 0.2 | 758 (585) | 0.2015 | 0.9 | −557 (199) | 0.0268 | 3.2 | −251 (117) | 0.0696 | 4.3 |
| Cut angle | 5.53 (5.92) | 0.3552 | 0.3 | −1.24 (3.36) | 0.7139 | 0.1 | 8.29 (20.3) | 0.6949 | 0.1 | −9.34 (11.9) | 0.4592 | 0.5 |
| Rope length | −33.9 (63.7) | 0.5969 | 0.1 | 6.36 (36.2) | 0.8612 | 0.0 | −82.6 (261) | 0.7611 | 0.0 | −32.3 (154) | 0.8394 | 0.0 |
| Cut depth | −1,818 (1,410) | 0.2038 | 2.1 | −2,006 (801) | 0.0160 | 3.3 | −1,499 (3,410) | 0.6734 | 0.1 | −2,720 (2,005) | 0.2171 | 1.1 |