  We study a nonequilibrium model with up-down symmetry and a noise parameter
$q$ known as majority-vote model of M.J. Oliveira 1992 with heterogeneous
agents on square lattice. By Monte Carlo simulations and finite-size scaling
relations the critical exponents $\beta/\nu$, $\gamma/\nu$, and $1/\nu$ and
points $q_{c}$ and $U^*$ are obtained. After extensive simulations, we obtain
$\beta/\nu=0.35(1)$, $\gamma/\nu=1.23(8)$, and $1/\nu=1.05(5)$. The calculated
values of the critical noise parameter and Binder cumulant are
$q_{c}=0.1589(4)$ and $U^*=0.604(7)$. Within the error bars, the exponents obey
the relation $2\beta/\nu+\gamma/\nu=2$ and the results presented here
demonstrate that the majority-vote model heterogeneous agents belongs to a
different universality class than the nonequilibrium majority-vote models with
homogeneous agents on square lattice.
