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Design and analyze twostage randomized trials with a continuous outcome measure. The package contains functions to compute the required sample size needed to detect a given preference, treatment, and selection effect; alternatively, the package contains functions that can report the study power given a fixed sample size. Finally, analysis functions are provided to test each effect using either summary data (i.e. means, variances) or raw study data.
Package details 


Author  Briana Cameron [aut, cph], Denise Esserman [ctb], Michael Kane [cre, ctb] (<https://orcid.org/0000000318996662>) 
Maintainer  Michael Kane <michael.kane@yale.edu> 
License  LGPL2 
Version  1.1.3 
URL  https://github.com/kaneplusplus/preference 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

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