A GIS-Based Modeling Approach for Determining the Efficiency of the Traffic System between Ancient Military Castles

Table 4

Univariate chi-square test for the terrain relief.

Terrain relief	Number of connected Bao Qi	Graded area (km^2)	Proportion of graded area (%)	The expected number Ei of the connected Bao under the assumption of H0	The difference between the actual number and the expected number χ^2
First level (0–1)	2	32945.88	41.50	0.829929985	1.65
Second level (1–3)	3	31645.66	39.86	1.195764787	2.72
Third level (3–5)	1	14802.82	18.64	0.186446745	3.55
Sum	6	79394.36	100.00	2.212141517	7.92