Select Statistical Method

---
name: select-statistical-method
description: "Select statistical inference/estimation method from design, distribution, sample size, pairing, multiplicity, and decision objective."
---

# select-statistical-method

## Purpose

Select statistical inference/estimation method from design, distribution, sample size, pairing, multiplicity, and decision objective.

## Input contract

```yaml
required: [design_structure, outcome_type, sample_size, decision_objective]
optional: [evidence, assumptions, prior_results]
constraints: [use named scientific objects; retain provenance and missingness; $\alpha$ = 0.05 and power = 0.8 where applicable]
```

## Procedure

1. Validate the typed inputs and state the decision this operation must support.
2. Apply the declared operation to the named object; record intermediate values that affect interpretation.
3. Check boundary conditions and counterexamples, then emit the result with uncertainty and source links.

If the statistical method fixes the required data, software, and randomness controls, consider `specify-reproducibility-protocol` as the next tactic.

## Output contract

```yaml
produces: [select_statistical_method_result, evidence_trace, uncertainties]
delta_fields: [evidence_updates, uncertainties]
```

## Quality gates

- Inputs are named scientific objects with compatible schemas.
- Every material result has a derivation or source reference.
- Fixed statistical criteria remain exact where applicable: $\alpha$ 0.05 and power 0.8.

## Failure and counterexamples

Return a failed operation with the violated precondition when inputs are incomplete, assumptions are unsupported, or a counterexample defeats the result.

## Provenance map

- intermediate: experiment-execution/statistical-method-selection [tactic]