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Journal of Mathematics
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2021
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Article
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Tab 3
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Research Article
Forecast of Freight Volume in Xi’an Based on Gray GM (1, 1) Model and Markov Forecasting Model
Table 3
State interval division.
State
Relative error interval (%)
(underestimated state)
[−15, −5]
(normal state)
[−5, 5]
(overestimated state)
[5, 15]