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. 2023 Mar 31;18(3):e0281101. doi: 10.1371/journal.pone.0281101

Fig 1. Performance of residual autocorrelation diagnosis, 1991–2020.

Fig 1

*The Ljung Box verification results can be seen from Fig 1(a)-1(c), the Ljung Box test statistics from Phase 1 to Phase 12 were all 5% higher than the significant level, indicating that there was no self correlation between the residual items of Phase 1 and Phase 12.