Figure 1.

Example plausible regions shown on $\log r_c$ and $\log r_t$ scales where the outcomes are “dead” (failure) and “alive” (success). The lightly shaded ellipse shows the “skeptical region” whose boundary lies between the points (1/5, 1/5) and (5, 5). The darker shaded ellipse shows the “optimistic region” whose boundary lies between the points (1/2, 1/2) and (2, 2). The point (1, 1) corresponds to missing at random