Levels of (a) |$q_{U_{i}D_{i}}$| with respect to |$\textstyle q_{U_iI_i}$| and levels of (b) |$\textstyle q_{U_iI_i}$| with respect to |$\tau_{U_i,C_i}$|⁠, all within 95 per cent confidence intervals. The levels of |$q_{U_{i}I_{i}}$| and |$\tau_{U_{i}, C_{i}}$| are depicted on the x-axes, while the corresponding levels of |$q_{U_{i}D_{i}}$| and |$q_{U_{i}I_{i}}$| are represented on the y-axes.