This site is a web-based interface to the R Sequential package. It allows users to perform analyses available in the R Sequential package, online, without installing and managing an R programming environment, and without writing any code in the R programming language.

The site is currently using R Sequential version 2.3.2.

The R Sequential package provides functions to calculate exact critical values, statistical power, expected time to signal and required sample sizes for performing exact sequential analysis. All these calculations can be done for either Poisson or binomial data, for continuous or group sequential analyses, and for different types of rejection boundaries. In case of group sequential analyses, the group sizes do not have to be specified in advance and the alpha spending can be arbitrarily settled.

For complete documentation, please visit the R Sequential CRAN page, or jump directly to the reference manual.