Free AI Tool

A/B Test Experiment Design Generator

Describe the hypothesis, primary metric, baseline rate, MDE, and traffic available. Get a power analysis with the formula shown, a pre-committed analysis plan, and the specific SRM and balance checks to run pre-test, during-test, and pre-analysis.

✓ Sample size rounded UP, with duration in days/weeks✓ Pre-commits the analysis plan and decision rule before the test runs✓ Flags tricky metrics (high-variance revenue, right-censored retention, novelty-prone)

Results in ~20 seconds · Saves ~45 minutes per experiment

AI Cowork Vault7 vaults · save $54 vs piecemeal

Save hours every week with the AI Career Lab — All 7 AI Cowork Vaults

All seven profession-specific AI Cowork Vaults — 315 skills total. Works on Claude Cowork and Microsoft 365 Copilot Cowork.

Get all 7 vaults for $49One-time payment · Updates free for life

Recommended for your workflow

AI Agent Store

Free to browse

Directory of AI agents and tools across categories — discover, compare, and adopt agents built for your workflow.

Browse AI Agents

Some links on this page are affiliate links. We may earn a commission if you purchase — at no extra cost to you. We only recommend tools we believe in for your profession.