TABLE 8. Russia: Numerical Validation of the Forecast Results.

Investigated states	Infected		Deaths
Metrics	NRMSE	SMAPE	NRMSE	SMAPE
RW model (Test I)	0.42	0.18	0.134	0.044
RW model (Test II)	0.27	0.122	0.411	0.143
Proposed model (Exp.)	0.099	0.052	0.066	0.0304
Proposed model (Uni.)	0.19	0.075	0.084	0.051
RW mean	0.226	0.121	0.175	0.068
RW upper bound	2.188	0.680	0.744	0.350
RW lower bound	1.935	1.312	1.716	0.447