Figure 5.

(For Design 3, θ ₁ = 0.5 and θ ₂ = 0) standardized bias and mean squared error (MSE) of ${\widehat{\theta }}_f$ and simulation proportions for different circumstances at stopping stage 1, 2, and overall, against the prevalence of subpopulation 1, ie, λ₁ [Colour figure can be viewed at http://wileyonlinelibrary.com]