A merchantable volume system for Pinus sylvestris L. in the major mountain ranges of Spain

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Table IV

F-test of the differences mountain ranges obtained with the model of Fang et al. (2000).

MR Model	n	SSE_F	df_F	SSE_R	df_R	df_R-df_F	F-value
Combined	38103	58105.7	38043	65197.7	38093	50	92.9^*
1–2	9659	23252	9639	23500	9649	10	10.3^*
1–3	3486	5076.4	3466	5485	3476	10	27.9^*
1–4	6534	5393.9	6514	5607.3	6524	10	25.8^*
1–5	17669	27553.5	17649	28229.6	17659	10	43.3^*
1–6	5223	5888.7	5203	6157.9	5213	10	23.8^*
2–3	10911	23799	10891	25549	10901	10	80.1^*
2–4	13959	24116.5	13939	24570.1	13949	10	26.2^*
2–5	25094	46276.1	25074	49809.1	25084	10	191.4^*
2–6	12648	24611.3	12628	25661.6	12638	10	53.9^*
3–4	7786	5940.9	7766	7457.3	7776	10	198.2^*
3–5	18921	28100.5	18901	31726.2	18911	10	243.9^*
3–6	6475	6435.7	6455	7916.8	6465	10	148.6^*
4–5	21969	28418	21949	29322.1	21959	10	69.8^*
4–6	9523	6753.2	9503	6982.6	9513	10	32.3^*
5–6	20658	28912.8	20638	29729	20648	10	58.3^*

The mountain ranges (MR) are defined in Table I.

An asterisk

^(*)

indicates a significant F-value at α = 0.001 (i.e., the models are different). The F-values were calculated according to Equation (9). n is the number of observations, SSE_F, df_F, SSE_R and df_R are the sum of squared errors and the degrees of freedom associated with the full and reduced models, respectively.