T test workspace

Open T test workspace 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": "t-test-workspace",
  "category": "calculators",
  "built": true,
  "requirements": "Runs locally in your browser in a background worker; nothing is uploaded. CSV up to 1,000,000 characters and 10,000 data rows, with dot-decimal numbers. Raw headers are group,value for two groups, before,after for paired data and value for one sample, or name your own columns. A summary CSV has the headers group,n,mean,sd with one row (one sample or paired differences) or two rows. 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, CSV tables (result, effect sizes, groups, checks and QQ points) and SVG charts.",
  "implementation": {
    "fields": [
      {
        "key": "design",
        "label": "Design",
        "value": "two-sample",
        "type": "select",
        "values": [
          "two-sample",
          "paired",
          "one-sample"
        ],
        "labels": {
          "two-sample": "Two independent groups",
          "paired": "Paired measurements",
          "one-sample": "One sample against a reference value"
        }
      },
      {
        "key": "data",
        "label": "Data",
        "value": "raw",
        "type": "select",
        "values": [
          "raw",
          "summary"
        ],
        "labels": {
          "raw": "Raw values in CSV",
          "summary": "Summary CSV with n, mean and sd"
        }
      },
      {
        "key": "groupColumn",
        "label": "Group column",
        "value": "group",
        "type": "text",
        "maxLength": 200,
        "help": "Exact header of the column that names the two groups.",
        "showWhen": {
          "design": [
            "two-sample"
          ],
          "data": [
            "raw"
          ]
        }
      },
      {
        "key": "valueColumn",
        "label": "Value column",
        "value": "value",
        "type": "text",
        "maxLength": 200,
        "help": "Exact header of the numeric column.",
        "showWhen": {
          "design": [
            "two-sample",
            "one-sample"
          ],
          "data": [
            "raw"
          ]
        }
      },
      {
        "key": "firstColumn",
        "label": "First measurement column",
        "value": "before",
        "type": "text",
        "maxLength": 200,
        "help": "Exact header. Differences are first minus second.",
        "showWhen": {
          "design": [
            "paired"
          ],
          "data": [
            "raw"
          ]
        }
      },
      {
        "key": "secondColumn",
        "label": "Second measurement column",
        "value": "after",
        "type": "text",
        "maxLength": 200,
        "help": "Exact header of the second measurement.",
        "showWhen": {
          "design": [
            "paired"
          ],
          "data": [
            "raw"
          ]
        }
      },
      {
        "key": "mu",
        "label": "Null value",
        "value": "0",
        "type": "text",
        "maxLength": 200,
        "help": "The difference (or mean) under the null hypothesis, for example 0."
      },
      {
        "key": "alternative",
        "label": "Alternative hypothesis",
        "value": "two-sided",
        "type": "select",
        "values": [
          "two-sided",
          "less",
          "greater"
        ],
        "labels": {
          "two-sided": "Two-sided",
          "less": "Less than the null value",
          "greater": "Greater than the null value"
        }
      },
      {
        "key": "confidence",
        "label": "Confidence level",
        "value": "0.95",
        "type": "text",
        "maxLength": 200,
        "help": "A proportion from 0.5 to 0.9999, for example 0.95."
      },
      {
        "key": "equalVariances",
        "label": "Assume equal variances (Student)",
        "value": false,
        "type": "checkbox",
        "showWhen": {
          "design": [
            "two-sample"
          ]
        }
      },
      {
        "key": "missing",
        "label": "Blank cells",
        "value": "reject",
        "type": "select",
        "values": [
          "reject",
          "drop"
        ],
        "labels": {
          "reject": "Stop and show an error",
          "drop": "Drop incomplete rows"
        },
        "showWhen": {
          "data": [
            "raw"
          ]
        }
      }
    ],
    "registrationFamily": "statistical-comparison-tests",
    "inputMaxLength": 1000000,
    "inputErrorCode": "STATISTICAL_COMPARISON_TESTS_TOO_LONG",
    "note": "Runs on your device in the background. Paste up to 1,000,000 characters of CSV with up to 10,000 values; Welch is the default for two groups.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "CSV data",
      "placeholder": "group,value",
      "help": "Paste raw values with a header row, or a summary CSV with group,n,mean,sd. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Paste raw values with a header row, or a summary CSV with group,n,mean,sd.",
        "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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