Experiment Trust Checks

mixed-card-deck battlecard comparison-card First check What should you check before interpreting experiment lift? Fair comparison Assignment and exposure balance. Treatment and control should be comparable on major drivers such as device, region, traffic source, and eligibility. Measurement Why can telemetry loss bias an A/B test? Missing outcomes are not neutral If events drop unevenly by arm, device, or stage, the measured outcome can shift even when user behavior did not. Telemetry checks protect the result from instrumentation artifacts. Decision Which launch readout is safer? Trust checks turn a result into a decision. Objection The result is significant. Why are we…

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