{"blocks": [{"key": "5268c7ad", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "012c1f26", "text": "Product team is launching a redesigned energy-usage dashboard and needs to measure its impact.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "d493f067", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "fdf1a76b", "text": "How would you design an A/B test to determine whether the new dashboard increases user engagement? Which metrics and statistical methods would you use, and how would you decide the test duration?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "78a85763", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "dad860e5", "text": "State hypothesis, randomize, compute sample size, discuss p-values, guardrail metrics.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}