Research Article
Practical Minimum Sample Size for Road Crash Time-Series Prediction Models
Table 5
The forecast error of the best-fit models for year 2016.
| Country | Sample size | Observed | Forecast | Error | Error (%) |
| Denmark | 45 | 2882 | 2742 | 140 | 4.86 | 35 | 2882 | 2501 | 381 | 13.22 | 25 | 2882 | 2424 | 458 | 15.89 | 15 | 2882 | 2607 | 275 | 9.54 |
| Turkey | 45 | 185128 | 192793 | −7665 | −4.14 | 35 | 185128 | 193693 | −8565 | −4.63 | 25 | 185128 | 196584 | −11456 | −6.19 | 15 | 185128 | 195566 | −10438 | −5.64 |
| Germany | 45 | 308145 | 304128 | 4017 | 1.30 | 35 | 308145 | 301026 | 7119 | 2.31 | 25 | 308145 | 297365 | 10780 | 3.50 | 15 | 308145 | 302629 | 5516 | 1.79 |
| Israel | 45 | 12966 | 12553 | 413 | 3.19 | 35 | 12966 | 12240 | 726 | 5.60 | 25 | 12966 | 11680 | 1286 | 9.92 | 15 | 12966 | 11799 | 1167 | 9.00 |
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