{"blocks": [{"key": "aa1dd237", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "98fa69fd", "text": "The product team wants to move the Google Maps search bar from the top to the bottom of the screen.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "6cd03c6a", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "f6fd923d", "text": "Design an A/B test to evaluate this UI change. Define hypothesis, primary and guardrail metrics, experiment unit, randomization, sample-size calculation, runtime, and how you would interpret the results.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "bb45fd3c", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "f538d414", "text": "Explain success metrics (e.g., searches per session), guardrails (retention, errors), power analysis, novelty effects, and rollout decisions.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}