TABLE 5.

Comparison of the first-order and Weibull models for the survival curves of feline calicivirus strain F9, murine norovirus 1, and hepatitis A virus^a

Virus strain	T(°C)	Weibull model			First-order model
		%V	RMSE	χ2	%V	RMSE	χ2
FCV-F9	50	97	0.003	0.0001	91	0.053	0.004
	56	97	0.043	0.002	91	0.138	0.026
	60	97	0.022	0.001	94	0.088	0.010
	65	91	0.037	0.001	84	0.369	0.182
	72	97	0.036	0.002	85	0.369	0.18
MNV-1	50	96	0.011	0.0002	94	0.018	0.0004
	56	99	0.001	0.0001	97	0.022	0.0006
	60	97	0.008	0.0001	97	0.022	0.0007
	65	91	0.021	0.0006	88	0.114	0.0172
	72	94	0.090	0.107	97	0.127	0.0898
HAV	50	97	0.003	0.0001	95	0.022	0.001
	56	97	0.002	0.0001	94	0.006	0.001
	60	97	0.014	0.0001	91	0.034	0.002
	65	97	0.013	0.0001	92	0.029	0.001
	72	97	0.051	0.0001	89	0.128	0.022

^aFCV-F9, feline calicivirus strain F9; MNV-1, murine norovirus 1; HAV, hepatitis A virus; %V, percentage of variance; RMSE, root mean square error; χ², chi square.