G*Power para Windows

G*Power is a free educational software designed for statistical power analysis, catering to various hypothesis test families, including t tests, F tests, and χ² tests. This utility features structured input fields that allow users to specify effect size, sample parameters, and significance levels, making it a versatile tool for researchers needing to calculate statistical power quickly. The software also includes calculators for effect size values based on standard statistical conventions, enhancing its usability in academic settings.

The program organizes power analysis into categorized menus corresponding to different statistical tests, providing input panels for selecting tails, distribution assumptions, and effect sizes. G*Power generates numeric output tables that display critical values and projected power estimates. Additionally, its graphical capabilities allow users to visualize power curves and other outputs, although it does not support dataset imports or direct data analysis functions. Numeric summaries and visual plots can be exported for external use.