[Retracted] Measurement of Coordination Degree between Economy and Logistics in Hebei Province, China, Based on Fractional Grey Model (1, 1)

Table 1

Levels of correlation degree.

Level	Weak	Moderate	Strong	Extremely strong
Correlation degree	0 < r ≤ 0.35	0.35 < r ≤ 0.65	0.65 < r ≤ 0.85	0.85 < r ≤ 1