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.
10 min read
How to calculate sample size for an A/B test: formula, example and calculator
How to calculate sample size for an A/B test: the formula, a worked example, how statistical power and MDE change the number, and a free calculator.