Left panel: Molecular-to-stellar mass ratio vs. sSFR. Data are color coded according to the morphological type, as in Fig. 3. The best-fit line is represented with a solid black line, and the gray-shaded region represents the 68% confidence interval of the posterior distribution of the parameters. The intrinsic dispersion (δ_intr) and correlation coefficients (namely, P and K) are reported in the lower (upper) right corner of the left (right) panel. Right panel: Star formation efficiency vs. stellar mass.