{"blocks": [{"key": "0938f6ea", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "ab9064fb", "text": "Search feature returns results counted as successful when both relevancy and accuracy binary flags are 1.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "9face7be", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "54f2a6b5", "text": "Model A was used by 100 users and had 90 successes; Model B also had 100 users and 85 successes. Using only these data, can you conclude that Model A is better? State the test, hypotheses, perform the calculation, and interpret.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "6a427673", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "c8c9f665", "text": "Set up two-proportion z-test. Calculate pooled variance, z-score, p-value, 95 % CI; discuss statistical power and practical significance.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}