Measurements of EW(Lyα) (first panel), Ext(Lyα-C) (second panel), Lyα peak shift (third panel), and Δv (fourth panel), together with the bootstrapping (see text) error bars for the subsamples listed in Table 1. The symbols correspond to the subsets listed in Table 1: galaxies fainter(brighter) than the median R magnitude of the entire sample are shown as red(blue) triangles; galaxies characterized by EW(Lyα) larger(smaller) than the median value are shown as red(blue) filled circles; galaxies characterized by EW(CIII]1908) larger(smaller) than the median value as red(blue) diamonds; galaxies with rest-frame UV concentration larger(smaller) than the median value as red(blue) hexagons; galaxies with Ext(Lyα-C) larger(smaller) than the median value as red(blue) squares; galaxies in overdense(underdense) regions as red(blue) tilted triangles; and galaxies more(less) massive than the median value as red(blue) pentagons.