Parametric Tests (Comparative)
For normally distributed research data.
Independent T-Test
Compare means of two unrelated groups (e.g., Treatment vs Control).
Open Calculator →Paired Samples T-Test
Compare means from the same group over time (e.g., Pre-test vs Post-test).
Open Calculator →Single Sample Z-Test
Compare your sample mean to a population mean.
Open Calculator →Z-Test for Proportions
Compare proportions of two independent groups.
Open Calculator →Non-Parametric Tests
Essential for skewed data or small sample sizes.
Wilcoxon Signed-Rank
Non-parametric alternative to paired t-test for ordinal data.
Open Calculator →Mann-Whitney U Test
Non-parametric alternative to independent t-test.
Open Calculator →Kruskal-Wallis Test
Compare 3+ independent groups (Non-parametric ANOVA).
Open Calculator →Friedman Test
Compare 3+ related groups (Non-parametric Repeated ANOVA).
Open Calculator →Run Test for Randomness
Analyze if data points are following a random sequence.
Open Calculator →ANOVA Models (Group Comparison)
Compare means across multiple group levels.
One-Way ANOVA
Compare means of 3+ groups with Tukey HSD post-hoc.
Open Calculator →One-Way Repeated Measures
Compare means across 3+ related groups.
Open Calculator →Two-Way ANOVA
Test the effect of two independent factors and their interaction.
Open Calculator →ANCOVA
Compare means while controlling for a covariate variable.
Open Calculator →Correlation & Prediction
Assess associations and model outcomes.
Pearson (r) Correlation
Measure linear strength for interval or ratio data.
Open Calculator →Spearman’s Rho
Measure relationship for ranked or non-normal data.
Open Calculator →Kendall’s Tau
Robust rank correlation for small sample sizes.
Open Calculator →Multiple Regression
Predict a dependent variable from multiple independent variables.
Open Calculator →Categorical Analysis
Analyze proportions, frequencies, and categorical associations.
Chi-Square Independence
Test association between categorical variables.
Open Calculator →Goodness of Fit
Determine if data fits an expected theoretical distribution.
Open Calculator →Fisher’s Exact (2x2)
Precise association test for very small samples.
Open Calculator →McNemar’s Test
Analyze paired categorical data for changes in proportion.
Open Calculator →Binomial Test
Determine if observed proportion differs from expected.
Open Calculator →Kaplan-Meier (Survival)
Analyze time-to-event data and survival proportions.
Open Calculator →Descriptive Statistics
Foundation for every research and statistics study.
Central Tendency
Calculate Mean, Median, Mode, Variance, and SD.
Open Tool →Normality (Shapiro-Wilk)
Verify if your data distribution is normal.
Open Tool →Levene’s Test
Test the homogeneity of variances before ANOVA.
Open Tool →Grubbs’ Outlier Test
Identify significant outliers in your dataset mathematically.
Open Tool →Charts & Data Visualmakers
Create professional research visualizations from your outputs.
Histogram Maker
Visualize the distribution of continuous data.
Create Chart →Scatter Plot Marker
Visualize relationships with regression lines.
Create Chart →Box & Whisker Plot
Visualize distribution, medians, and outliers.
Create Chart →Bar Chart Maker
Compare categorical counts or group means.
Create Chart →Pie Chart Maker
Visualize proportions within categorical data.
Create Chart →Violin Plot Maker
Combine box plot data with probability density.
Create Chart →Bubble Chart Maker
Add a third dimension (size) to scatter plot data.
Create Chart →Line Graph Maker
Track changes over time or across group levels.
Create Chart →Mosaic Plot Maker
Visualize contingency table (Chi-Square) data relationships.
Create Chart →Kaplan-Meier Plotter
Visualize survival curves and event analysis.
Create Chart →Research Utilities
Supported tools for reliability, writing, and precision.
Cronbach’s Alpha
Calculate reliability for survey scales.
Open Tool →Effect Size (Cohen’s d)
Calculate practical significance of your comparative research.
Open Tool →Critical Value Calculator
Find Critical Z, T, F, and Chi-Square values instantly.
Open Tool →Log-Rank Test Calculator
Compare two Kaplan-Meier survival curves statistically.
Open Calculator →AI Humanizer
Refine drafts for better flow and natural tone.
Open Tool →