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Judgment & ambiguity · When to act

Two rounds of A/B testing on a new landing layout come back roughly flat versus the control — no clear winner either way. The client wants a recommendation now. Do you call it, run a third round, or revert? How do you decide?

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Flat across two rounds is itself an answer: the change didn't move the metric that mattered.

The full answer: structure, worked example, likely follow-up.

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