Shiny R Web Apps


Shiny web apps are online applications that use R on a server (instead of a local machine). These apps are based on the full power of the R language and environment for statistical computing, but do not require the user to install R or even know anything about R. The apps are generally very simple to use.

Effect Sizes

Confidence Intervals

Power and Sample Size Planning

Bias and Uncertainty Corrected Sample Size for Power

ANCOVA with Heterogeneity of Regression and a Random Covariate