Group Comparison Analyzer
Compare numeric outcomes with confidence intervals and effect sizes.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Group Comparison Analyzer
- Open or paste your data, or load the working sample.
- Choose columns and explicit processing rules. Review the proposed result and warnings.
- Download the chosen result dataset, JSON artifact or report; save a draft to continue later.
What are the limits of Group Comparison Analyzer?
Two independent groups only. Welch t test with Student t distribution, Welch degrees of freedom and 95% confidence interval for the mean difference. Hedges g uses pooled standard deviation and small-sample correction. Requires at least 2 observations/group; paired, clustered or repeated measurements violate assumptions. Not a binary conversion A/B test. Inputs stay in browser memory. No workbook is created. Table limits: 5 MB total text, 25,000 rows, 64 columns and 200,000 cells; expensive operations have stricter limits. Processing can be cancelled.