G-star-Power is a widely-used software suite for conducting power analysis across a variety of statistical tests. While R packages exist for power analysis, they often lack the ease of use and graphical interface that G-star-Power offers.

Your task is to develop a new version of this software using R and the Shiny library. Shiny enables the creation of rich, interactive, and dynamic web applications directly in R. Given that G*Power is freely available, you are encouraged to download it and familiarize yourself with its features: https://www.psychologie.hhu.de/arbeitsgruppen/allgemeine-psychologie-und-arbeitspsychologie/gpower Shiny is also available at no cost, and you can learn more about it here: https://shiny.rstudio.com/

As a deliverable I expect a Shiny App that will perform the power analysis for at least those tests: * binomial test * t-tests for comparing means * chi-square tests * t-tests for correlation

You are welcome to expand the app’s functionality by incorporating additional tests. The app must be interactive, allowing users to select a test and input their data through a graphical user interface. It should provide both textual and graphical outputs (e.g., plots). While you may use G*Power as a model for your app’s functionality, feel free to innovate in terms of user experience (UX) and design if you have ideas for improvements.