{
  "pack": "edtech-practice-evalpack",
  "misata_version": "0.8.7.1",
  "seed": 42,
  "spec_sha256": "442a7dd34251d5d05e7e8face9ae50add7034f11507daf5706a823fb0c6bb55f",
  "tables": {
    "students": 600,
    "practice_attempts": 15000
  },
  "questions_shipped": 17,
  "questions_dropped": 4,
  "dropped_questions": [
    {
      "id": "q015",
      "question": "In the practice_attempts table, what fraction of rows during January 2025 (rows whose timestamp is on or after 2025-01-01 and strictly before 2025-02-01) have correct equal to True? Give a number rounded to 4 decimal places.",
      "gold_sql": "SELECT ROUND(AVG(CASE WHEN \"correct\" = TRUE THEN 1.0 ELSE 0.0 END), 4) FROM \"practice_attempts\" WHERE \"attempted_at\" >= TIMESTAMP '2025-01-01 00:00:00' AND \"attempted_at\" < TIMESTAMP '2025-02-01 00:00:00'",
      "expected_answer": 0.55,
      "answer_type": "number",
      "tags": [
        "rate",
        "temporal_window",
        "single_table"
      ],
      "source": {
        "kind": "rate_curve_anchor",
        "table": "practice_attempts",
        "column": "correct",
        "period": "2025-01"
      },
      "round_decimals": 4,
      "drop_reason": "verification_mismatch",
      "observed": 0.5499
    },
    {
      "id": "q016",
      "question": "In the practice_attempts table, what fraction of rows during February 2025 (rows whose timestamp is on or after 2025-02-01 and strictly before 2025-03-01) have correct equal to True? Give a number rounded to 4 decimal places.",
      "gold_sql": "SELECT ROUND(AVG(CASE WHEN \"correct\" = TRUE THEN 1.0 ELSE 0.0 END), 4) FROM \"practice_attempts\" WHERE \"attempted_at\" >= TIMESTAMP '2025-02-01 00:00:00' AND \"attempted_at\" < TIMESTAMP '2025-03-01 00:00:00'",
      "expected_answer": 0.576,
      "answer_type": "number",
      "tags": [
        "rate",
        "temporal_window",
        "single_table"
      ],
      "source": {
        "kind": "rate_curve_anchor",
        "table": "practice_attempts",
        "column": "correct",
        "period": "2025-02"
      },
      "round_decimals": 4,
      "drop_reason": "verification_mismatch",
      "observed": 0.5761
    },
    {
      "id": "q018",
      "question": "In the practice_attempts table, what fraction of rows during April 2025 (rows whose timestamp is on or after 2025-04-01 and strictly before 2025-05-01) have correct equal to True? Give a number rounded to 4 decimal places.",
      "gold_sql": "SELECT ROUND(AVG(CASE WHEN \"correct\" = TRUE THEN 1.0 ELSE 0.0 END), 4) FROM \"practice_attempts\" WHERE \"attempted_at\" >= TIMESTAMP '2025-04-01 00:00:00' AND \"attempted_at\" < TIMESTAMP '2025-05-01 00:00:00'",
      "expected_answer": 0.628,
      "answer_type": "number",
      "tags": [
        "rate",
        "temporal_window",
        "single_table"
      ],
      "source": {
        "kind": "rate_curve_anchor",
        "table": "practice_attempts",
        "column": "correct",
        "period": "2025-04"
      },
      "round_decimals": 4,
      "drop_reason": "verification_mismatch",
      "observed": 0.6279
    },
    {
      "id": "q020",
      "question": "In the practice_attempts table, what fraction of rows during June 2025 (rows whose timestamp is on or after 2025-06-01 and strictly before 2025-07-01) have correct equal to True? Give a number rounded to 4 decimal places.",
      "gold_sql": "SELECT ROUND(AVG(CASE WHEN \"correct\" = TRUE THEN 1.0 ELSE 0.0 END), 4) FROM \"practice_attempts\" WHERE \"attempted_at\" >= TIMESTAMP '2025-06-01 00:00:00' AND \"attempted_at\" < TIMESTAMP '2025-07-01 00:00:00'",
      "expected_answer": 0.68,
      "answer_type": "number",
      "tags": [
        "rate",
        "temporal_window",
        "single_table"
      ],
      "source": {
        "kind": "rate_curve_anchor",
        "table": "practice_attempts",
        "column": "correct",
        "period": "2025-06"
      },
      "round_decimals": 4,
      "drop_reason": "verification_mismatch",
      "observed": 0.6799
    }
  ],
  "conformance_warnings": [],
  "story_audit": {
    "clean": true,
    "score": 100.0,
    "findings": []
  },
  "schema": {
    "name": "edtech-practice-evalpack",
    "description": null,
    "domain": null,
    "tables": [
      {
        "name": "students",
        "row_count": 600,
        "description": null,
        "is_reference": false,
        "inline_data": null,
        "columns": [],
        "constraints": [],
        "workflow_preset": null,
        "workflow_config": null,
        "correlations": [],
        "state_machine": null,
        "scd2": null,
        "cluster_effect": null
      },
      {
        "name": "practice_attempts",
        "row_count": 15000,
        "description": null,
        "is_reference": false,
        "inline_data": null,
        "columns": [],
        "constraints": [],
        "workflow_preset": null,
        "workflow_config": null,
        "correlations": [],
        "state_machine": null,
        "scd2": null,
        "cluster_effect": null
      }
    ],
    "columns": {
      "students": [
        {
          "name": "student_id",
          "type": "int",
          "distribution_params": {
            "min": 1,
            "max": 99999,
            "distribution": "normal",
            "_distribution_is_default": true
          },
          "nullable": false,
          "unique": true,
          "description": null
        },
        {
          "name": "grade_level",
          "type": "int",
          "distribution_params": {
            "min": 8,
            "max": 12,
            "distribution": "normal",
            "_distribution_is_default": true
          },
          "nullable": false,
          "unique": false,
          "description": null
        },
        {
          "name": "signup_date",
          "type": "datetime",
          "distribution_params": {
            "start": "2024-01-01",
            "end": "2024-12-31"
          },
          "nullable": false,
          "unique": false,
          "description": null
        }
      ],
      "practice_attempts": [
        {
          "name": "attempt_id",
          "type": "int",
          "distribution_params": {
            "min": 1,
            "max": 9999999,
            "distribution": "normal",
            "_distribution_is_default": true
          },
          "nullable": false,
          "unique": true,
          "description": null
        },
        {
          "name": "student_id",
          "type": "foreign_key",
          "distribution_params": {},
          "nullable": false,
          "unique": false,
          "description": null
        },
        {
          "name": "attempted_at",
          "type": "datetime",
          "distribution_params": {
            "start": "2025-01-01",
            "end": "2025-06-30"
          },
          "nullable": false,
          "unique": false,
          "description": null
        },
        {
          "name": "correct",
          "type": "boolean",
          "distribution_params": {},
          "nullable": false,
          "unique": false,
          "description": null
        },
        {
          "name": "duration_seconds",
          "type": "int",
          "distribution_params": {
            "min": 5,
            "max": 900,
            "distribution": "normal",
            "_distribution_is_default": true
          },
          "nullable": false,
          "unique": false,
          "description": null
        }
      ]
    },
    "relationships": [
      {
        "parent_table": "students",
        "child_table": "practice_attempts",
        "parent_key": "student_id",
        "child_key": "student_id",
        "temporal_constraint": false,
        "filters": null
      }
    ],
    "events": [],
    "outcome_curves": [
      {
        "table": "practice_attempts",
        "column": "duration_seconds",
        "time_column": "attempted_at",
        "time_unit": "month",
        "pattern_type": "seasonal",
        "intra_period_pattern": "uniform",
        "value_mode": "absolute",
        "description": null,
        "avg_transaction_value": null,
        "min_transactions_per_period": 1,
        "max_transactions_per_period": 10000,
        "concentration": 2.0,
        "start_date": null,
        "curve_points": [
          {
            "date": "2025-01-01",
            "target_value": 500000.0
          },
          {
            "date": "2025-02-01",
            "target_value": 520000.0
          },
          {
            "date": "2025-03-01",
            "target_value": 540000.0
          },
          {
            "date": "2025-04-01",
            "target_value": 560000.0
          },
          {
            "date": "2025-05-01",
            "target_value": 580000.0
          },
          {
            "date": "2025-06-01",
            "target_value": 600000.0
          }
        ]
      }
    ],
    "rate_curves": [
      {
        "table": "practice_attempts",
        "column": "correct",
        "time_column": "attempted_at",
        "time_unit": "month",
        "true_value": true,
        "interpolate": true,
        "description": null,
        "rate_points": [
          {
            "period": "2025-01",
            "rate": 0.55
          },
          {
            "period": "2025-02",
            "rate": 0.5760000000000001
          },
          {
            "period": "2025-03",
            "rate": 0.6020000000000001
          },
          {
            "period": "2025-04",
            "rate": 0.628
          },
          {
            "period": "2025-05",
            "rate": 0.654
          },
          {
            "period": "2025-06",
            "rate": 0.68
          }
        ]
      }
    ],
    "group_shares": [],
    "waterfalls": [],
    "stock_flows": [],
    "generation_mode": "anchored",
    "noise_config": null,
    "realism": null,
    "seed": 42,
    "vocabularies": null
  }
}