newsletterAugust 11, 2026·Towards Data Science
Stop Calling the First Significant Day a Win
Checking an A/B test until it crosses p < 0.05 can turn a nominal 5 percent false-positive rate into almost 28 percent. I use a seeded simulation to show how large the damage gets and compare the fixes that keep early stopping honest. The post Stop Calling the First Significant Day a Win appeared fi
Checking an A/B test until it crosses p < 0.05 can turn a nominal 5 percent false-positive rate into almost 28 percent. I use a seeded simulation to show how large the damage gets and compare the fixes that keep early stopping honest. The post Stop Calling the First Significant Day a Win appeared first on Towards Data Science.
Key Takeaways
- •Checking an A/B test until it crosses p < 0.05 can turn a nominal 5 percent false-positive rate into almost 28 percent
- •This story was reported by Towards Data Science, covering developments in the newsletter space.
- •AI advancements continue to reshape industries — read the full article on Towards Data Science for complete coverage.
📖 Continue reading the full article:
Read Full Article on Towards Data Science →
