Fisher's Exact Test Two - Modified with Added Statistics

This GeoGebra example demonstrates an interactive visualization of Fisher's exact test for 2x2 contingency tables, showing how exact p-values are computed under fixed marginal totals using the hypergeometric distribution. The core mathematical concept is conditional inference and the hypergeometric probability model, where the sum of probabilities of tables as extreme or more extreme than observed determines statistical significance. The construction uses Segment commands to draw the table grid and auxiliary lines, along with numerous text objects (text1 through text22) to display observed frequencies, row/column margins, expected counts, and p-values. Users can modify cell values via sliders or input fields to see real-time updates. This resource is suitable for high school and undergraduate statistics courses, providing an intuitive tool for teaching hypothesis testing, contingency table analysis, and exact probability calculations.