Business Metrics
How to diagnose a drop in repurchase rate
Decompose the numerator and denominator, avoid false conclusions, and identify the real business driver.
Articles
Data analysis tutorials and case studies
Practical tutorials adapted into English for overseas readers. Start with the A/B testing and business metrics articles if you want templates and checklists.
A/B Testing
What is A/B testing? A practical guide for analysts
Understand control groups, treatment groups, hypotheses, metrics, sample size, and decision rules.
A/B Testing
A/B test design template for data analysts
Define hypotheses, traffic split, target users, experiment duration, and success metrics before launch.
A/B Testing
How to write an A/B test analysis report
Summarize experiment impact, explain statistical results, and recommend whether to launch or keep testing.
Business Metrics
How data analysts break down business problems
Turn vague stakeholder questions into metrics, segments, hypotheses, and practical next steps.
Business Metrics
How to improve conversion rate with data analysis
Find funnel leaks, segment problems, user friction, and testable conversion opportunities.
Business Metrics
Industry analysis framework for data analysts
Analyze market structure, value chains, competitors, metrics, and strategy implications.
Analyst Career
Data analyst interview guide for beginners
Prepare SQL, metrics, case questions, portfolio stories, and concise business communication.
Analyst Career
How to learn data analysis in 3 weeks
A focused beginner roadmap covering spreadsheets, SQL, projects, and communication.
Analyst Career
How to package a data analyst portfolio project
Turn a project into a clear analyst deliverable with a question, method, finding, and recommendation.