{"blocks": [{"key": "2fa52a68", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "c956cb2c", "text": "A ride-hailing company just updated its rider ETA-prediction algorithm and wants to quantify the marketplace impact.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "fa0a7917", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "dcd1187d", "text": "Design an experiment to measure how the new rider-ETA model affects the business.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "0417905f", "text": "Which primary success metrics would you track on the demand and supply sides?", "type": "unordered-list-item", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "2111e072", "text": "What intermediate or leading indicators would you monitor?", "type": "unordered-list-item", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "951e614e", "text": "Would you pick a classic A/B test or a synthetic-control approach? Explain the design, randomization unit, duration, and how you would interpret results.", "type": "unordered-list-item", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "2e0d2d96", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "1e08d503", "text": "Map customer → marketplace funnel, define guardrail KPIs, consider network interference, seasonality, and statistical power before choosing between parallel A/B and geo-level synthetic control.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}