Table 7.
Comparison of model outputs, generated by fitting the model with the 22 surviving parameter sets, and validation patterns, including results of the t-test (not significantly different at P = 0.05), and absolute and relative differences between model outputs and observations
| Model (n = 1100) | Observation | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pattern | Mean | s.d. | s.e. | Mean | s.e. | n | t | d.f. | P | Difference | Relative difference (%)* | t-distribution (d.f. = 1099) |
| P8E† | 209.26 | 54.42 | 191.9‡ | 17.36 | 9.04 | |||||||
| P8I† | 252.34 | 54.42 | 191.9‡ | 60.44 | 31.49 | 252.34 ± 106.77 | ||||||
| P9 | 187.64 | 64.83 | 238.2‡ | −50.56 | −21.23 | 187.64 ± 127.20 | ||||||
| P10 | 192.11 | 1.95 | 193 | 66 | 15 | −0.01 | 14.02 | 0.99 | −0.89 | −0.46 | ||
| P11 | 632.09 | 4.24 | 720 | 131 | 5 | −0.67 | 4.01 | 0.54 | −87.91 | −12.21 | ||
| P12 | 4279.03 | 200.35 | 4060‡ | 219.03 | 5.39 | |||||||
| P13 | 6.82 | 0.07 | 6.5 | 0.24 | 16 | 1.26 | 17.94 | 0.23 | 0.32 | 4.85 |
*The relative difference is calculated from model minus observation (difference) then divided by observation.
†P8E refers to the mean length of spring growth flush excluding the reproductive zone, whereas P8I indicates the mean length of spring growth flush including the reproductive zone.
‡Statistical analysis methods were not applicable, because the cited articles did not report the s.d. or s.e. and n for the observed mean values.
Note: for P8 we did not know whether the length of the spring growth flush from the cited article included a reproductive zone. Therefore, we compared our model prediction with two scenarios, spring growth flush including a reproductive zone and spring growth flush excluding a reproductive zone, to see how they differed. The observed mean for P8I lies in the range 252.34 ± 106.77 (t-distribution; d.f. = 1099).