Statistical Analysis

Casa Research

A complete statistical workbench in your browser. No AI, no API calls, no data leaving your machine — pure JavaScript math.

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Everything you need

Six analytical tools, zero dependencies, zero data transmission.

Descriptive Statistics
Mean, median, mode, standard deviation, quartiles, skewness, kurtosis — the full picture.
Linear Regression
OLS with R², adjusted R², t-stats, p-values, F-statistic, and residual diagnostics.
ANOVA
One-way analysis of variance with sum of squares, F-test, and group comparisons.
Correlation Matrix
Pearson r for every pair of variables, color-coded for instant pattern recognition.
t-Tests
One-sample and two-sample independent t-tests with confidence intervals and Cohen's d.
Data Visualization
Scatter plots, histograms, box plots, bar charts, and line charts — all rendered in your browser.

9 tools. Zero cost. Zero data transmission.

Every tool runs entirely in your browser. Nothing is sent to any server.

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Workbench
The full statistical toolkit. Paste data, get descriptive stats, regression, ANOVA, correlation, and t-tests.
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Visualize
Build scatter plots, histograms, box plots, bar and line charts from your data. Export as PNG.
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Survey Analysis
Frequency tables, cross-tabulations, chi-square tests, and Likert scale analysis.
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A/B Test Calculator
Test statistical significance between two variants. Z-test, p-values, required sample size.
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Sample Size Calculator
How many participants do you need? Power analysis for means, proportions, and margin of error.
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Time Series
Trend analysis, moving averages, autocorrelation, and seasonal decomposition.
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Bayesian Analysis
Prior-posterior updating and Bayesian A/B testing with Monte Carlo simulation.
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Templates
Pre-loaded datasets — Iris, exam scores, surveys, sales data, clinical trials, and more.
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Report Generator
Compile your analysis into a clean, printable report. Add text, tables, and stats.
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Get started in seconds

1
Paste from Excel or Google Sheets
2
Drag and drop a CSV file
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Or just type directly into the table
Your data never leaves your machine