{"blocks": [{"key": "2814f016", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "419c242f", "text": "Designing an A/B test for a new homepage layout", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "279f1275", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "db931851", "text": "Describe how you would design an experiment to measure the impact of the new layout on purchase rate: population, metrics, randomization, sample size, duration, bias control, and analysis plan.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "8d6985f4", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "e50f9dfa", "text": "Mention success metric, guardrails, power analysis, segmentation, and validity threats.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}