Relation between sSFR and stellar mass for ETDs (red) and LTD (blue). Within each redshift bin, both ETDs and LTDs are separated into three stellar mass ranges: 10.0 ≤ log(M_*/M_⊙) < 10.4, 10.4 ≤ log(M_*/M_⊙) < 10.8, and log(M_*/M_⊙)≥10.8. The median values of the distributions for ETDs and LTDs are shown in red and blue squares, respectively. The corresponding standard error of the median is derived from 1000 bootstrap estimates for the sample in a given stellar mass bin.