Figure 4.

Optimal decision regions for symmetric case (p₁ = 1/2, Λ = Λ₁), for oss functions (a) $L_D^{(1)}$ and (b) $L_D^{(1)}$. For comparability to Figure 1, we included the solid line representing the boundary of the rejection region for $M_{H_{0C}}^{\mathrm{U}\mathrm{M}\mathrm{P}}$.