{"blocks": [{"key": "2cbaa5e8", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "bf64ec7e", "text": "The product’s key metric suddenly drops. Stakeholders want a structured diagnosis and experiment plan.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "97d72437", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "a5053899", "text": "List plausible causes for the performance drop, describe analyses you would run to validate each cause, and design an A/B test to confirm the main hypothesis. Which primary and guardrail metrics would you track and why?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "8eaf1be1", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "3aa53b41", "text": "Think segmentation, funnel breakouts, external factors, and metric hierarchy (north-star vs. health).", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}