{"blocks": [{"key": "a31878b7", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "d347f811", "text": "Product usage dropped 10 % in the U.S. and 11 % in Mexico.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "512b70fe", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "a30d28e3", "text": "Identify potential confounders, design an A/B test to isolate the cause, specify the variables you would control, and explain how you would report findings to stakeholders.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "8dea9871", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "f858557a", "text": "Segment users, hold out controls, present causal lift estimates.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}