Distribution of the correlation ratios inferred from δ_d on the six sky regions for the ℓ range 50–160. The histograms are computed from the 300 E2E simulations using half-mission data splits. The dashed lines represent the median values on each sky region. This median value, μ, and the standard deviation, σ, are printed in the upper right of each panel. The lower limits on in Table 5 are derived from the 2.5th percentile of the distribution for each sky region.