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What's the biggest mistake you've made with data or metrics, and how did you catch it?

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Every PM has trusted a number they shouldn't have. Panels want to hear a real mistake, how it was caught, what it cost, and the habit that changed.

Updated Nov 2026 · Original practice questions with worked answers and teaching rubrics. Our editorial policy explains the sources, review process and limits.

Every PM has trusted a number they shouldn't have. Panels want to hear a real mistake, how it was caught, what it cost, and the habit that changed.

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