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. 2020 Oct 12;5:827–838. doi: 10.1016/j.idm.2020.10.002

Table 5.

Residual test of the models.

Box-Ljung test
Country χ2 df p-value
SA 42.911 20 0.21
Nigeria 32.505 20 0.3821
Ghana 12.233 20 0.9078
Egypt 21.819 20 0.3504