PDFs ﹩{p}^{\mu }(q| {\boldsymbol{\theta }})﹩ (top panels) and ﹩{p}^{\mu }(u| {\boldsymbol{\theta }})﹩ (bottom panels) for various CTR model parameters ﹩{\boldsymbol{\theta }}=\{a,\bar{B}\}﹩ (indicated at the top of each panel). For the sake of simplicity, we assume that the joint PDF can be factorized as ﹩{p}^{\mu }({\boldsymbol{S}}| {\boldsymbol{\theta }})={p}^{\mu }(q| {\boldsymbol{\theta }}){p}^{\mu }(u| {\boldsymbol{\theta }})﹩. For each value of μ (horizontal axis), the darker shades of gray indicate larger PDF values. The dashed red curves in the top panels show the CLV of the q signals after averaging the q values at each μ (cf. Figure 2). The PDFs are normalized to unity at each μ value. See the text for more details. The gray-scale color table differs from panel to panel in order to improve the contrast of the individual plots. The normalization is such that ﹩\int {p}^{\mu }(q| {\boldsymbol{\theta }})\ {dq}=\int {p}^{\mu }(u| {\boldsymbol{\theta }})\ {du}=1﹩ for every μ.