Evidence row 2201247

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://stats-tests.x402tookit.com/chi-square-test"
    ]
  ],
  "name": "Statistical Tests",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Chi-square goodness of fit (observed vs expected counts) or independence test on a table, with p-value and effect size.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "observed": "5,8,9,8,10,20"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T08:55:55.262Z",
              "cellsWithExpectedBelow5": 0,
              "chiSquare": 13.4,
              "contributions": [
                2.5,
                0.4
              ],
              "degraded": false,
              "degreesOfFreedom": 5,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "expected": [
                10,
                10
              ],
              "notChecked": [
                "independence of observations (each subject counted once)",
                "random sampling",
                "…2 more"
              ],
              "pValue": 0.01990522,
              "reasons": [
                "All expected counts are at least 5.",
                "Statistic = sum of (observed - expected)^2 / expected; df = categories - 1."
              ],
              "significantAt5pct": true,
              "source": "computed locally",
              "summary": "Goodness of fit: chi-square 13.4, df 5, p = 0.01991: observed counts differ significantly from the expected pattern at the 5% level.",
              "test": "chi-square goodness of fit",
              "total": 60,
              "verdict": "SIGNIFICANT"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "expected": {
                      "description": "Expected counts (same length) or leave out for equal expected",
                      "type": "string"
                    },
                    "observed": {
                      "description": "Observed counts for goodness of fit, e.g. 5,8,9,8,10,20",
                      "type": "string"
                    },
                    "table": {
                      "description": "Contingency table for independence, rows separated by semicolons: 12,5;3,10",
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "cellsWithExpectedBelow5": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "chiSquare": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "contributions": {
                      "items": {
                        "type": "number"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "degreesOfFreedom": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "expected": {
                      "items": {
                        "type": "number"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "pValue": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "significantAt5pct": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "test": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "total": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-02T04:07:26.14Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-02T04:07:25.98Z"
    },
    "resource": "https://stats-tests.x402tookit.com/chi-square-test",
    "serviceName": "Statistical Tests",
    "tags": [
      "statistics",
      "chi-square",
      "hypothesis-test",
      "contingency-table"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Chi-square goodness of fit (observed vs expected counts) or independence test on a table, with p-value and effect size."
}

What the leaf hashes

{"body":"45f8c98cf7a13fd4304a2195b0b0138ef0d93aae3ee967bfab1ca7eaa9297a4e","id":2201247,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646803029861,"prev":null,"subject":"x402_bazaar:https://stats-tests.x402tookit.com/chi-square-test","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0xa032ae86a09e12eace3442ba0b932f19c5cf7321ca0fd0a7f65c5781b4774055
2. 0x50232075f602c7cb55aee6e8a996facfb7eb6e4832fffa19033472053c876dd7
3. 0x7fa75b34fd9bc6831f0a7b9cda6efca8b25382ce8d65f2afe5ba68b370c9bff5
4. 0xc7fd3e138be5fef107d59855f6b38798dc400bac9e40d4ac58843a30f626c621
5. 0xfa4cb5c976074e9bf2fb6af5bacef84809c0602b9c152b242ba6ae47d94468fd
6. 0x50fd586d717bbdca01ca023be78e5021915fb7ee4699dbc8520119872e2fab0c
7. 0x78ab2fd8b50647ed16460a5305f2fbf013b42c97d70033c20397cf3d38d4875f
8. 0x66f761eb837a85ffe5b4dff51dcc0c6d63e65ccd192f1bb62a08a9be43e02bb7
9. 0xbcf50c0735884db398136427c9e6895bb052aa700ef818833cd049d91adddc63
10. 0x2f27a12daeb52a6be4b0afac30b1c00052c4b0b99ceade47791f319a97c616b3
11. 0x731aed48e6ebaea0f0f1f25553e659f1a1914079500e9c2f2d1dfe746b9a61d9
12. 0x276e2fa0c21c2220acec5005667f6b7cfa183a8daaf7f317e5077bc4c6e08db0
13. 0x2ff7b1db58554b94f3d17b53c4f892ded109f497ad86eeaa0f83588921b759b1
14. 0xdff61622855886d80ecda4fb808422c854d0801605b73184332cf83604a730ff
15. 0x9c91ecb84461aa4cb2a891252746755d862a88fe9bad822700cdb99eaab2edca
16. 0x7731256c7406f95d30aabe3bbcb574b72535b9c28e8eb3db363210761a28a6b9
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af