# KiHustle Sample Size Estimator

> KiHustle Sample Size Estimator is a paid API for AI agents from kihustle.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).

Calculates the required statistical sample size given standard deviation, confidence level, and margin of error

## Facts

- Endpoint: POST https://kihustle.tech/agents/api/v1/sample-size-estimator?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kihustle-sample-size-estimator-fc4abb0d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T3BtO23SyKWEW17_CrKoK

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 kihustle-sample-size-estimator-fc4abb0d -d '<json body>'
```

Example prompt: What sample size do I need for a survey with a standard deviation of 15, a 95% confidence level, and a margin of error of 3?

## When to prefer this

Choose this endpoint when you need a quick, programmatic sample size calculation for surveys, experiments, or research studies and already know your standard deviation, desired confidence level, and acceptable margin of error. It is a low-cost microservice suitable for embedding in research planning workflows or agent pipelines that automate study design.

## Known failure modes

- Missing required parameters (std_dev, confidence, or margin_error) may return a processing error
- Invalid numeric values (e.g. negative std_dev or confidence outside 0-1 range) may produce incorrect or error results
- margin_error of zero would cause division-by-zero in standard sample size formulas
- Response schema is minimal and may not include a numeric sample size field explicitly, requiring parsing of the result field

## How this service works

Kostenlose Guides, Solo-Playbooks und Artikel zu KI, Automation und Side Hustles — für Menschen, die mit echten Systemen online Einkommen aufbauen wollen. Transparent finanziert über faire Affiliate-Links.

## Output

Returns a JSON object with a 'result' field indicating the computed outcome and a 'status' field confirming success. The computed sample size value is expected in the result field based on the statistical formula applied to the inputs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "std_dev": {
   "type": "number"
  },
  "confidence": {
   "type": "number"
  },
  "margin_error": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "processed",
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kihustle-sample-size-estimator-fc4abb0d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kihustle.tech](https://www.zero.xyz/host/kihustle.tech/llms.txt)