Pearson correlation coefficients with 95% confidence interval (left) and P-value (right) between nine COMs and several source properties for the CALYPSO source sample. These parameters were derived from the plots shown in Figs. I.1–I.3 and 8. The colors indicate the variables used to evaluate the degree of correlation between the molecules and the source properties: column density (black), column density multiplied by the solid angle Ω of the COM emission and divided by either the 1.3 mm continuum peak flux density or the 1.3 mm continuum flux density integrated over the size of the COM emission, S_c1 (red), column density multiplied by the solid angle Ω of the COM emission and divided by the 3 mm continuum peak flux density, S_c3 (blue), column density normalized to that of CH₃OH (green). The source properties investigated here are the internal luminosity (bottom), the envelope mass (middle), and the ratio envelope mass over internal luminosity (top).