{"blocks": [{"key": "7fc519ad", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "10467342", "text": "BCG CodeSignal test – multiple-choice ML theory block", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "42600eaa", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "f7912fec", "text": "Explain what the Area Under the ROC Curve (AUC) measures. How do you interpret a model with AUC = 0.5 and AUC = 0.9? List three techniques to deal with severe class-imbalance in a binary-classification problem and briefly describe each.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "0408499d", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "2424d959", "text": "Cover resampling, thresholding and metric choice; relate AUC to true/false positive trade-off.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}