Exact Confidence Intervals Following a Group Sequential Test

Puntos clave

• This research aims to develop a numerical method for calculating confidence intervals with exact coverage probabilities following group sequential tests.
• Utilizes a numerical method to compute confidence intervals for the mean of a normal distribution.
• Implements an ordering of the sample space akin to the approach of Siegmund (1978).
• Compares the proposed method with traditional confidence interval calculations.
• The proposed method produces confidence intervals with exact coverage probabilities.
• The new intervals may demonstrate improved accuracy compared to conventional methods.