Bland (2009) tools:::Rd_expr_doi("10.1136/bmj.b3985") recommended to base study sizes on the width of the confidence interval rather the power of a statistical test. The goal of 'presize' is to provide functions for such precision based sample size calculations. For a given sample size, the functions will return the precision (width of the confidence interval), and vice versa.
Maintainer: Alan G. Haynes alan.haynes@ctu.unibe.ch
Authors:
Armando Lenz armando.lenz@ctu.unibe.ch
Andreas Limacher andreas.limacher@ctu.unibe.ch
Other contributors:
Odile Stalder odile.stalder@ctu.unibe.ch [contributor]
Marie Roumet marie.roumet@ctu.unibe.ch [contributor]
Useful links: