Table 1.

Preferred form of the Nine Curve Estimation models with OLS estimator: COVID-19 Confirmed Cases.

Models	Form	Adj. R2	DW-test		SW-test
			Value	P-value	Value	P-value
Linear	Quartic	0.9949	0.3204	4.783e-013***	0.9695	0.1137
Logarithm	Simple+	0.3448	0.0312	1.798e-018***	0.7721	1.37e-008***
Inverse	Quartic	0.4137	0.112	1.798e-018***	0.8302	4.32e-007***
Power	Simple+	0.7876	0.0848	1.798e-018***	0.9156	0.0003***
Compound	Quartic	0.9891	0.3768	5.459e-013***	0.9087	0.0002***
S-Curve	Quartic	0.9318	0.526	1.798e-010***	0.9271	0.001***
Growth	Quartic	0.9891	0.3768	5.459e-013***	0.9087	0.0002***
Exponential	Quartic	0.9891	0.3768	5.459e-013***	0.9087	0.0002***
Logistic (u=2000)	Quartic	0.9901	0.5327	1.798e-010***	0.9097	0.0002***

NOTE: (i) Bold implies most preferred of the nine models.

(ii) + implies exact multicollinearity made other forms of the variable to be omitted.

(iii) The maximum COVID-19 confirmed cases for the period of study was1932.