Categorical association tester

Open Categorical association tester on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "categorical-association-tester",
  "category": "calculators",
  "built": true,
  "requirements": "Runs locally in your browser in a background worker; nothing is uploaded. CSV up to 1,000,000 characters. Counts tables have 2 to 20 rows and 2 to 20 count columns, whole-number counts and unique row labels; raw data has up to 10,000 rows and 2 to 20 categories per column, with labels of at most 80 characters. McNemar's test needs a 2 x 2 table. Exact r x c enumeration allows at most 100,000 observations and 10,000,000 search steps. Monte Carlo uses 100 to 10,000 replicates and at most 100,000 observations, with observations times replicates at most 50,000,000. Confidence level 0.5 to 0.9999. Setting numbers are plain decimals with a digit before the point, such as 0.95, without exponents. In CSV with two or more columns a blank line between rows is rejected, and in one-column CSV it is a blank cell; blank lines after the last row are ignored. Downloads: a JSON report and CSV tables (tests, observed, expected and residuals).",
  "implementation": {
    "fields": [
      {
        "key": "inputMode",
        "label": "Data",
        "value": "table",
        "type": "select",
        "values": [
          "table",
          "raw"
        ],
        "labels": {
          "table": "Counts table (first column holds row labels)",
          "raw": "Raw rows with two category columns"
        }
      },
      {
        "key": "rowColumn",
        "label": "Row category column",
        "value": "row",
        "type": "text",
        "maxLength": 200,
        "help": "Exact header of the first category column.",
        "showWhen": {
          "inputMode": [
            "raw"
          ]
        }
      },
      {
        "key": "columnColumn",
        "label": "Column category column",
        "value": "column",
        "type": "text",
        "maxLength": 200,
        "help": "Exact header of the second category column.",
        "showWhen": {
          "inputMode": [
            "raw"
          ]
        }
      },
      {
        "key": "test",
        "label": "Test",
        "value": "association",
        "type": "select",
        "values": [
          "association",
          "mcnemar"
        ],
        "labels": {
          "association": "Association (chi-square, G and Fisher)",
          "mcnemar": "McNemar for paired yes/no outcomes (2 x 2)"
        }
      },
      {
        "key": "yates",
        "label": "Yates continuity correction for 2 x 2 tables",
        "value": true,
        "type": "checkbox"
      },
      {
        "key": "fisher",
        "label": "Fisher exact test",
        "value": "auto",
        "type": "select",
        "values": [
          "auto",
          "exact-2x2",
          "exact-rxc",
          "monte-carlo",
          "none"
        ],
        "labels": {
          "auto": "Automatic: exact when possible, Monte Carlo for large tables",
          "exact-2x2": "Exact 2 x 2 with odds ratio interval",
          "exact-rxc": "Exact for any table size (small tables only)",
          "monte-carlo": "Seeded Monte Carlo",
          "none": "Do not run"
        },
        "showWhen": {
          "test": [
            "association"
          ]
        }
      },
      {
        "key": "replicates",
        "label": "Monte Carlo replicates",
        "value": "2000",
        "type": "text",
        "maxLength": 200,
        "help": "Whole number from 100 to 10,000.",
        "showWhen": {
          "test": [
            "association"
          ],
          "fisher": [
            "auto",
            "monte-carlo"
          ]
        }
      },
      {
        "key": "seed",
        "label": "Monte Carlo seed",
        "value": "happytails",
        "type": "text",
        "maxLength": 100,
        "help": "Any text of 1 to 100 characters. The same seed gives the same p-value.",
        "showWhen": {
          "test": [
            "association"
          ],
          "fisher": [
            "auto",
            "monte-carlo"
          ]
        }
      },
      {
        "key": "confidence",
        "label": "Confidence level for the 2 x 2 odds ratio",
        "value": "0.95",
        "type": "text",
        "maxLength": 200,
        "help": "A proportion from 0.5 to 0.9999.",
        "showWhen": {
          "test": [
            "association"
          ]
        }
      }
    ],
    "registrationFamily": "statistical-comparison-tests",
    "inputMaxLength": 1000000,
    "inputErrorCode": "STATISTICAL_COMPARISON_TESTS_TOO_LONG",
    "note": "Runs on your device in the background. Paste a counts table up to 20 x 20 or up to 10,000 raw rows, at most 1,000,000 characters.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Counts table or raw CSV",
      "placeholder": "label,category A,category B",
      "help": "Paste counts with row labels in the first column, or raw rows with two category columns. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Paste counts with row labels in the first column, or raw rows with two category columns.",
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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