# T Test

Browse 15 online T Test tools for working with t test data and statistical tasks in your browser.

> Canonical page: https://elysiatools.com/en/tags/t-test

## Overview

Explore 15 T Test tools for working with t test data and related statistical workflows. Use the tools in your browser without installing software; processing runs on Elysia Tools servers.

## Frequently asked questions

### What can I do with T Test tools?

You can use this collection of 15 tools for T Test-related data and statistical tasks through a browser-based interface.

### Do I need to install software to use these tools?

No. You can operate the tools in your browser without installing software, while processing runs on Elysia Tools servers.

### How is my data handled?

Text inputs are not stored. Uploaded files are automatically deleted after 6 hours, and processing runs on Elysia Tools servers.

## Tools

- [A/B Test Significance Calculator](https://elysiatools.com/en/tools/ab-test-significance-calculator): Compute conversion-rate or mean differences, 95%/99% confidence intervals, two-sided p-values (Z-test for proportions, Welch t for continuous metrics), lift, sample size for 80%/90% power, recommended experiment days, plus sequential-testing and Bonferroni multiple-comparison warnings.
- [API Breaking Changes Detector & Migration Planner](https://elysiatools.com/en/tools/api-breaking-changes-detector-migration-planner): Compare two OpenAPI 3.x schemas, identify breaking changes, grade client impact, and suggest migration or compatibility strategies
- [API Contract Mutation Tester](https://elysiatools.com/en/tools/api-contract-mutation-tester): Mutate OpenAPI request fields into semantically risky variants and optionally send them to a real backend to check defensive validation coverage
- [API Contract Stress Tester](https://elysiatools.com/en/tools/api-contract-stress-tester): Generate boundary-value test cases from an OpenAPI 3.x document and optionally send them to a real backend to spot contract mismatches
- [Fisher Exact Test Calculator](https://elysiatools.com/en/tools/fisher-exact-test-calculator): Run Fisher exact test for a 2 x 2 contingency table with exact one-sided or two-sided p-values
- [HTTP Request Tester](https://elysiatools.com/en/tools/http-request-tester): A lightweight in-browser HTTP client (mini Postman): send GET/POST/PUT/DELETE requests with custom headers and body, inspect status, headers, timing, and formatted response — all from your browser
- [One Sample t Test Calculator](https://elysiatools.com/en/tools/one-sample-t-test-calculator): Run a one-sample t test from raw data or summary statistics, including p-value and confidence interval
- [P Value Calculator](https://elysiatools.com/en/tools/p-value-calculator): Calculate one-tailed or two-tailed p-values for Z, t, chi-square, and F test statistics
- [Paired t Test Calculator](https://elysiatools.com/en/tools/paired-t-test-calculator): Run paired-sample t tests from before and after values or precomputed paired differences
- [PDF RTL/LTR Support Tester (PDF双向文字测试)](https://elysiatools.com/en/tools/pdf-rtl-ltr-support): Preview left-to-right and right-to-left text flow in PDF with bidi reordering
- [T Distribution Calculator](https://elysiatools.com/en/tools/t-distribution-calculator): Calculate Student t distribution PDF, CDF, tail probability, two-tail probability, and central area
- [T-Test Calculator](https://elysiatools.com/en/tools/t-test-calculator): Run one-sample or two-sample t-tests from raw data and inspect t statistics, degrees of freedom, and p-values
- [Two Sample t Test Calculator](https://elysiatools.com/en/tools/two-sample-t-test-calculator): Run an independent two-sample t test with pooled variance from raw data or summary statistics
- [WebSocket Tester](https://elysiatools.com/en/tools/websocket-tester): Connect to any WebSocket (ws:// or wss://) endpoint from your browser, send and receive messages, and inspect open/close/error events with codes — ideal for debugging real-time APIs and sockets
- [Welch t Test Calculator](https://elysiatools.com/en/tools/welch-t-test-calculator): Run Welch two-sample t tests for independent groups with unequal variances from raw data or summary statistics

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