PASSED:Calculate Power and Sample Size for Two Sample Mean Tests
Power calculations are a critical component of any research study to determine the minimum sample size necessary
to detect differences between multiple groups. Here we present
an 'R' package, 'PASSED', that performs power and sample size
calculations for the test of two-sample means or ratios with
data following beta, gamma (Chang et al. (2011),
<doi:10.1007/s00180-010-0209-1>), normal, Poisson (Gu et al.
(2008), <doi:10.1002/bimj.200710403>), binomial, geometric, and
negative binomial (Zhu and Lakkis (2014),
<doi:10.1002/sim.5947>) distributions.
