# Tutoring Sessions — Category Frequencies + Two-Measure Correlation

> Tutoring Sessions — Category Frequencies + Two-Measure Correlation is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-26).

Analyzes tutoring session records to produce category frequency counts for course groups and a Pearson/rank correlation between session_minutes and session_count.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-education-16-108?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-26
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tutoring-sessions-category-frequencies-two-measure-correlation-d4976bb4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QTCTpFAdWqO97fOZX7aVd

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tutoring-sessions-category-frequencies-two-measure-correlation-d4976bb4 -d '<json body>'
```

Example prompt: I have up to 200 tutoring session records with fields like course_group, date, session_minutes, and session_count — can you run a category frequency breakdown by course_group and also compute the correlation between session_minutes and session_count?

## When to prefer this

Choose this endpoint when you have tabular tutoring session data and need both a categorical frequency breakdown by group and a linear/rank correlation between two numeric measures in a single low-cost call. It is ideal for education analytics pipelines where you want quick descriptive stats without setting up a data warehouse. At $0.01 USDC for two reports on up to 200 rows, it is cost-effective for lightweight per-batch analysis. Prefer alternatives if you need predictions, external data enrichment, more than 200 rows, or more than two analytical report types.

## Known failure modes

- More than 200 rows submitted — request will be rejected or truncated
- Missing required fields (row_id, course_group, date, session_minutes, session_count) cause validation errors
- Null values in session_minutes or session_count may reduce correlation sample size or produce NaN
- Invalid date format (not YYYY-MM-DD) fails schema validation
- Empty rows array returns no meaningful output

## How this service works

Tutoring sessions — Category frequencies + Two-measure correlation: Category frequencies + Two-measure correlation for supplied tutoring sessions records (session_minutes, session_count). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Returns two analytical reports: (1) a category frequency table showing how many records fall into each course_group value, and (2) a two-measure correlation report quantifying the statistical relationship between session_minutes and session_count across the supplied rows. No external data is fetched; all computation is performed locally on the submitted dataset of up to 200 rows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "course_group",
     "date",
     "session_minutes",
     "session_count"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "course_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "session_count": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "session_minutes": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "course_group": "group-a",
     "session_count": 1,
     "session_minutes": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "course_group": "group-b",
     "session_count": 2,
     "session_minutes": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "course_group": "group-a",
     "session_count": 3,
     "session_minutes": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "course_group": "group-b",
     "session_count": 4,
     "session_minutes": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tutoring-sessions-category-frequencies-two-measure-correlation-d4976bb4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)