The Complete Guide to A/B Testing: Sample Size, Duration, and Significance
How to size an A/B test, set the right duration, and judge significance: sample size, MDE, full business cycles, fixed stopping rules, multiple-testing fixes.
Oct 8, 2026
How to size an A/B test, set the right duration, and judge significance: sample size, MDE, full business cycles, fixed stopping rules, multiple-testing fixes.
Build a tagging system in order: unify IDs, layer factual, statistical and model tags with time decay and lifecycle governance, deploy and verify impact.
Conversion rate down: diagnose first - confirm measurement, break down traffic and funnel, check trust and friction, then pinpoint the page and action.
Funnel analysis gives a conclusion, not a chart: where and why drop-off happens. Learn 3 funnel decisions, the drill-down to find loss, and 3 common pitfalls.
How to design a membership program? Set the goal first, then structure: points drive behavior, tiers segment users, benefits deliver value, each owning one job.
Landing page optimization comes down to 12 elements: a hero that states value fast, proof that removes doubt, low-friction forms, and one clear primary CTA.
Score recency, frequency and monetary value to build eight RFM segments, pair each with a lifecycle-stage play, and dodge four common segmentation pitfalls.
Ecommerce data analysis starts with the metric system: build three layers for traffic, conversion and value, pick a north star metric, then design dashboards.
Traffic is up but orders are not. This CRO guide shows how to define the metric, find the top funnel leak, fix trust, friction and motivation, then A/B test.
Dashboards built, decisions unchanged? Start from decision scenarios and metric definitions, then fix collection, dashboards and workflow actions step by step.
WeCom