Summary:
The text provides an in-depth exploration of group sequential testing in the context of A/B testing and experimentation. It discusses the challenges of peeking and early stopping and presents various correction methods such as Bonferroni correction and group sequential testing with Pocock and O’Brien & Fleming approximations. The article emphasizes the trade-offs involved in different peeking frequencies and addresses potential biases and the concept of stopping for futility. The author emphasizes the need for power analysis and optimal peeking strategies, while providing references and code for further exploration.
Word count: 241 words
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Understanding Group Sequential Testing
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