Figure 1.

Simulation results under the null hypothesis: (a) type I error of the equivalence test; (b) coverage probability of the 90% confidence interval; and (c) ratio of the widths of the confidence intervals with versus without the prior evidence. The solid, dashed, dotted, and dot-dashed curves pertain to ${\alpha }_1^{\mathit{opt}}$, α₁ = 0, α₁ = 0.2α, and α₁ = 0.4α, respectively. The solid and dashed curves are indistinguishable.