Table 3.

Estimation of the parameters (65) of the model (66) according to the criterion (70) in 2 stages for an unknown degree $b$ of probability of infection by one infected person of one susceptible person

Parameters and criteria	Initial values	Stages of calculations
		1	2
$r_0$	2.5	1.334	1.295
$N$	8.747	1.878	2. 961
$b$	1	0.212	0.296
$p_c$	0.25	0.25	0.409
$p_E$	0.4	0.4	0.685
${\mathrm{\Delta }}_1$	0.3	0.3	0.460
$n_1$	0.5	0.5	0.787
$n_2$	0.1	0.1	0.560
$d_1$	0.8	0.8	0.753
$F(\mathbf{a})$	1719.732	6.793	5.080
$\mathrm{\Phi }(\mathbf{a})$	821.182	28.086	22.654
$\mathrm{\Phi }(\mathbf{a})/\left(T-t_0\right)$	5.264	0.180	0.145

Here, $\mathrm{\Phi }(\mathbf{a})$ is the sum of the modules of relative errors and$\mathrm{\Phi }(\mathbf{a})/\left(T-t_0\right)$ is the average module of relative errors