← The evidence ledger
Evidence row 2201242
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://stats-tests.x402tookit.com/mann-whitney
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 5666d11117b169ced9e9df02d95c370857dfabf8f47a9509f0bf346f39d50fa0
- Leaf
- 0x59558229dbc26698a5c91b6d9b34a351e4c90ba668d16fe1b4bd59522eaa9d10
What was observed
{
"endpoints": [
[
"x402",
"https://stats-tests.x402tookit.com/mann-whitney"
]
],
"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": "Mann-Whitney U test for two independent samples: U, exact p for small samples without ties or normal approximation, effect size.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"a": "1,2,3,4,5",
"b": "6,7,8,9,10"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T08:55:56.056Z",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"method": "exact distribution",
"nA": 5,
"nB": 5,
"notChecked": [
"assumptions: independent observations and similar distribution shapes (otherwise it tests stochastic dominance, not medians)",
"paired data (use the paired t-test or Wilcoxon signed-rank)",
"…1 more"
],
"pValueTwoSided": 0.0079365079,
"probabilityAExceedsB": 0,
"rankBiserial": 1,
"rankSumA": 15,
"reasons": [
"No ties and small samples: the p-value is exact.",
"Rank-biserial correlation 1 (0 none, 1 complete separation)."
],
"significantAt5pct": true,
"source": "computed locally",
"summary": "U = 0 (U_A = 0, U_B = 25), two-sided p = 0.007937 (exact distribution); probability a random A value exceeds a random B value: 0.",
"ties": false,
"uA": 0,
"uB": 25,
"uStatistic": 0,
"verdict": "SIGNIFICANT"
},
"type": "json"
}
},
"schema": {
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"properties": {
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},
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"type": "object"
},
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},
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"type": "object"
},
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},
"degraded": {
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"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"method": {
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"null",
"string"
]
},
"nA": {
"type": [
"null",
"number"
]
},
"nB": {
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"null",
"number"
]
},
"notChecked": {
"items": {
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},
"type": [
"array",
"null"
]
},
"pValueTwoSided": {
"type": [
"null",
"number"
]
},
"probabilityAExceedsB": {
"type": [
"null",
"number"
]
},
"rankBiserial": {
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"null",
"number"
]
},
"rankSumA": {
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"number"
]
},
"reasons": {
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},
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"null"
]
},
"significantAt5pct": {
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"boolean",
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]
},
"source": {
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"string"
]
},
"summary": {
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]
},
"ties": {
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"null"
]
},
"uA": {
"type": [
"null",
"number"
]
},
"uB": {
"type": [
"null",
"number"
]
},
"uStatistic": {
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"null",
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]
},
"verdict": {
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}
},
"type": "object"
},
"type": {
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}
},
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}
},
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],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:07:34.268Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-02T04:07:34.053Z"
},
"resource": "https://stats-tests.x402tookit.com/mann-whitney",
"serviceName": "Statistical Tests",
"tags": [
"statistics",
"mann-whitney",
"non-parametric",
"hypothesis-test"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Mann-Whitney U test for two independent samples: U, exact p for small samples without ties or normal approximation, effect size."
}What the leaf hashes
{"body":"5666d11117b169ced9e9df02d95c370857dfabf8f47a9509f0bf346f39d50fa0","id":2201242,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646802997994,"prev":null,"subject":"x402_bazaar:https://stats-tests.x402tookit.com/mann-whitney","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0xd47b32905b0c958ce87bd341f3600e18e5b326b604b8dcbb89fc074c9b7cdf29
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- 0xc73349c9955998a166e6e5920ac8ee0aa7bc6c9d66bace60f6dbd465dd9e0530
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af