APL programs for outcome probabilities and confidence limits in sequential binomial trials.

Abstract

For closed sequential binomial sampling plans (including plans for multistage sampling), the probability of reaching each terminal point is calculated. These probabilities are cumulated from "each side" of the plan. Thus, the power function obtainable by defining any (reasonable) acceptance region can be studied. Corresponding to a given outcome of the trial confidence limits can be calculated by an auxiliary program.