{"blocks": [{"key": "5554e70b", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "085e360d", "text": "Facebook considering launching restaurant recommendations in the News Feed.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "d04bfded", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "85903a08", "text": "Design an experiment to evaluate the feature: define treatment, control, success metrics, guardrail metrics, sample-size approach, and rollout criteria.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "8feed72d", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "b081d763", "text": "Focus on incremental engagement, CTR, downstream orders; watch for feed scroll depth and churn.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}