test_selection_guide

This guide provides a decision tree for selecting appropriate statistical tests based on research questions, data types, and study designs.

Skills
Scientific
4

What it does and how to use it

A skill that teaches Claude Code to do scientific tasks well. It is packaged knowledge the model uses whenever it is relevant.

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Install (Claude Code)

mkdir -p .claude/skills/test-selection-guide && curl -fsSL https://doutorai.pt/data/lib/skills__test-selection-guide.md -o .claude/skills/test-selection-guide/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# Statistical Test Selection Guide

This guide provides a decision tree for selecting appropriate statistical tests based on research questions, data types, and study designs.

## Decision Tree for Test Selection

### 1. Comparing Groups

#### Two Independent Groups
- **Continuous outcome, normally distributed**: Independent samples t-test
- **Continuous outcome, non-normal**: Mann-Whitney U test (Wilcoxon rank-sum test)
- **Binary outcome**: Chi-square test or Fisher's exact test (if expected counts < 5)
- **Ordinal outcome**: Mann-Whitney U test

#### Two Paired/Dependent Groups
- **Continuo

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