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easyAb Testing And Experimentation
A team launches an A/B test for a new recommendation model. They run the test for 3 days and observe a 4.2% CTR lift in the treatment group (p=0.04). A data scientist declares the experiment a success and recommends shipping the new model. A senior engineer asks: "Did you check for the novelty effect?" What is the novelty effect, and why does it threaten the validity of a 3-day experiment?
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  • 1.Concepts over memorization.
  • 2.Identify trade-offs in every solution.