Quadratic Moderator Plotter
Draw interaction plots for quadratic moderation with clean, publication-ready visuals.
Advanced Quadratic Plot
Interactive quadratic regression plots with controls for coefficients and scaling.
Advanced Panel Data Explorer
Explore panel data: missingness, trends, maps (ISO-3), PCA, correlations/lags, breaks, and Excel export.
Unidimensional Index Builder
Build a single composite index with diagnostics (VIF, KMO, Bartlett, MAP, PA), reliability, multiple methods, and one-click export.
Sample Size Calculator
Estimate the required sample size for survey research with statistical references.
Visualizing the Critical Values
Compare test values with table values for probability distributions interactively.
Survey Data Analysis
Analyze survey datasets: review variable types, generate univariate/bivariate plots, and export report-ready visuals.