Dissection of the JI confidence intervals for the whole HM galaxy population (see Sect. 7.4.1). The dashed green lines represent the systematic uncertainty, while the dashed blue lines represent the uncertainty from bootstrapping both N(R) and σ_los(R). The dashed red lines and the red shaded region mark the overall 1σ confidence interval. The vertical black line represents the R_200c of the stacked cluster.