  We present position-position-velocity (PPV) cubes of the physical and
chemical properties of the molecular medium in the central 1.2 kpc region of
the active galaxy NGC 613 at a PPV resolution of
0.$^{\prime\prime}$8$\times$0.$^{\prime\prime}$8$\times$10 km s$^{-1}$
(0.$^{\prime\prime}$8 = $\sim$68 pc). We used eight molecular lines obtained
with ALMA. Non-LTE calculation with hierarchical Bayesian inference was used to
construct PPV cubes of the gas kinetic temperature ($T_\mathrm{kin}$),
molecular hydrogen volume density ($n_\mathrm{H_2}$), column densities
($N_\mathrm{H_2}$), and fractional abundances of four molecules
($^{12}$C$^{18}$O, HCN, HCO$^+$, and CS). The derived $n_\mathrm{H_2}$,
$N_\mathrm{H_2}$, and $T_\mathrm{kin}$ ranged 10$^{3.21-3.85}$ cm$^{-3}$,
10$^{20.8-22.1}$ cm$^{-2}$, and 10$^{2.33-2.64}$ K, respectively. Our first
application of the non-LTE method with the hierarchical Bayesian inference to
external galaxies yielded compatible results compared with the previous studies
of this galaxy, demonstrating the efficacy of this method for application to
other galaxies. We examined the correlation between gas surface density
$\Sigma_\mathrm{H_2}$ (converted from $N_\mathrm{H_2}$) and the star formation
rate $\Sigma_\mathrm{SFR}$ obtained from the 110 GHz continuum flux map and
found two distinct sequences in the $\Sigma_\mathrm{H_2}$-$\Sigma_\mathrm{SFR}$
diagram; the southwestern subregion of the star-forming ring exhibited a
$\sim$0.5 dex higher star formation efficiency (SFE;
$\Sigma_\mathrm{SFR}/\Sigma_\mathrm{H_2}$) than the eastern subregion. However,
they exhibited no systematic difference in $n_\mathrm{H_2}$, which is often
argued as a driver of SFE variation. We suggest that the deficiency of
molecular gas in the southwestern subregion, where no significant gas supply is
evident along the offset ridges in the bar, is responsible for the elevated
SFE.
