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Lessons learned from Ronny Kohavi and Luke Sonnet: running trustworthy experiments

Blog post from GrowthBook

Post Details
Company
Date Published
Author
Ashley Stirrup
Word Count
2,618
Company Posts That Month
25
Language
English
Hacker News Points
-
Post removed?
No
Summary

GrowthBook's webinar, featuring experts Ronny Kohavi and Luke Sonnet, focused on the challenges of ensuring A/B test results are reliable, emphasizing that while generating data is straightforward, obtaining trustworthy data is complex. Drawing insights from Kohavi's extensive experience at companies like Amazon and Microsoft, and Sonnet's leadership at GrowthBook, the webinar highlighted common pitfalls in A/B testing such as underpowered tests, misinterpreted p-values, and sample ratio mismatches. The discussion stressed the importance of rigorous setup practices like power calculations, setting realistic Minimum Detectable Effects (MDEs), and choosing appropriate significance thresholds based on the cost of errors. Post-experiment checks such as verifying sample ratios and computing false positive risks were recommended to enhance result reliability. The session underscored that A/B tests, while a gold standard in experimentation, require careful planning and analysis to avoid misleading conclusions, and GrowthBook offers tools to facilitate these best practices.

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