9 min read
How long to run an A/B test: from sample size to whole weeks
How long to run an A/B test: divide the required sample by eligible daily traffic, round up to whole weeks, and plan for novelty effects and sales.
Articles about Sample size
RSS feedArticles for product managers and marketers about Sample size: plain explanations, examples and common mistakes.
9 min read
Minimum detectable effect (MDE): how to choose it for an A/B test
What minimum detectable effect (MDE) means, relative vs absolute, and how to set it from business value and your traffic. With a worked example.
9 min read
A/B test sample size: how many users you need
How to calculate A/B test sample size from baseline, MDE, power and significance, with a worked example and the mistakes that waste weeks.