Power and Sample Size for Group Sequential Trials. The main features of this product are: Power and Sample Size calculations for Two Means test, Two Proportions test and Log Rank test.
Choice of four alpha spending functions, O’Brien-Fleming, Pocock, Hwang-Shih-DeCani and Power as well as option to manually specify boundaries. Plots of boundary values. Plots of power vs sample size. Output statement detailing the parameters involved in the trial.
Detailed analysis of alpha spending and power at each interim ‘look’. Easy to use spreadsheet style interface. Interactive Help and input advice. Customizable screen layout and configuration.
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