Figure 4: (a) the available data from both differential age method and radial BAO size method (see Table 1 and references therein). The solid curve plots the theoretical Hubble parameter as a function of from the spatially flat model with . (b) the same data, but the residuals with respect to the theoretical model are plotted. In both panels, the error bars on the measurements from the radial BAO method are used to mark the extents of the two independent redshift slices in which the BAO peaks were measured.