Figure 5: 95% confidence intervals for measured speech recognition with single test lists as a function of the true recognition score. The bounds for p±1.96 · σ'(p) with n'=29 (left) and n'=58 (right) are given as magenta lines. The symbols give the bounds directly obtained from the empirical Poisson binomial distribution for the groups (NH: blue circles, HI: black triangles) when using one test list (left) and two test lists (right).