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