Regression & Plots

📐

Quadratic Moderator Plotter

Draw interaction plots for quadratic moderation with clean, publication-ready visuals. Supports multiple moderator levels and custom axis labels.

Moderation
Quadratic
Publication plots
Open App
▶ Demo

📈

Advanced Quadratic Plot

Interactive quadratic regression plots with live controls for coefficients and scaling. Visualise U-shaped and inverted-U relationships instantly.

Quadratic regression
Interactive
Coefficient control
Open App
▶ Demo



Data & Index Tools

🗂️

Advanced Panel Data Explorer

Explore panel data in depth: missingness heatmaps, trends, world maps (ISO-3), PCA, correlations, lags, structural breaks, and one-click Excel export.

Panel data
Missingness
PCA
World map
Excel export
Open App
▶ Demo

🧩

Unidimensional Index Builder

Build a single composite index with full diagnostics: VIF, KMO, Bartlett, MAP, parallel analysis, reliability (alpha/omega), multiple construction methods, and one-click export.

Index construction
KMO / Bartlett
Reliability
VIF
Open App
▶ Demo

Survey & Distribution Tools

📋

Sample Size Calculator

Estimate required sample size for survey research using multiple statistical methods, with academic references and exportable results.

Sample size
Survey research
Statistical methods
Open App
▶ Demo

🔔

Visualizing the Critical Values

Interactively compare test statistics against critical values for major probability distributions. Ideal for teaching and exam preparation.

Critical values
Distributions
Hypothesis testing
Open App
▶ Demo

📊

Survey Data Analysis

Analyse survey datasets end-to-end: review variable types, generate univariate and bivariate plots, and export report-ready visuals in one click.

Survey analysis
Univariate plots
Bivariate plots
Export
Open App
▶ Demo