Redshift evolution scaled average entropy measurements of binned groups (gray diamonds) at three radii (0.15r_500c, r_2500c, r_500c) as a function of characteristic temperature, T(r < r_500c). The colors of the gray data points represent the average masses (M_500c) of the groups within the corresponding Voronoi bin. Error-weighted averages of the data points are plotted as white circles, statistical uncertainties of the averages are shown with blue error bars, and the overall error budget of the average measurements resulting from the statistical and systematic uncertainties are shown with red error bars (see Sect. 4 for the details of the accounted systematics).