statistical-significance-annotation SKILL.md skillA
statistical-significance-annotation from jaechang-hits/sciagent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jaechang-hits/sciagent-skills/statistical-significance-annotation@git:20260428.81ea2d2Pins git:20260428.81ea2d2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jaechang-hits/sciagent-skills
- Path
skills/data-visualization/statistical-significance-annotation/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260428.81ea2d2, committed Apr 28, 2026
- First version recorded
- Apr 2, 2026
- Size
- 11,896 bytes
- Repository stars
- 381
- License
- a license file GitHub does not identify
Guide for annotating statistical significance (p-value asterisks) on comparison plots. Covers standard notation (ns, *, **, ***, ****), matplotlib bracket+asterisk implementation, and use with seaborn box/violin/bar plots. Use when preparing publication-ready figures with significance markers.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Statistical Significance Annotation on Plots
## Overview
Statistical significance annotations (asterisk notation) are visual markers placed on comparison plots to indicate the results of hypothesis tests between groups. They consist of brackets connecting two groups and asterisk symbols denoting the p-value range. Proper annotation ensures that the visual claims in a figure match the quantitative evidence, making plots publication-ready and scientifically rigorous. This guide covers the standard conventions, when and how to annotate, and a reusable matplotlib implementation.
## Key Concepts
### Standard Asterisk Notation
The widely adopted convention maps p-value ranges to asterisk symbols:
| Symbol | P-value Range | Meaning |
|--------|--------------|---------|
| ns | p > 0.05 | Not significant |
| \* | p <= 0.05 | Significant |
| \*\* | p <= 0.01 | Highly significant |
| \*\*\* | p <= 0.001 | Very highly significant |
| \*\*\*\* | p <= 0.0001 | Extremely significant |
The conversion function:
```python
def pvalue_to_asterisk(p: float) -> str:
"""Convert a p-value to standard asterisk notation."""
if p <= 0.0001:
return "****"
elif p <= 0.001:
…Read the whole file at its exact version.
How to install
mdr add jaechang-hits/sciagent-skills/statistical-significance-annotation@sha256:1764541ea615b38bThe line at the top of this page pins the label git:20260428.81ea2d2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_f5fglfn2nrikuqup)
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Versions
The registry has recorded 2 versions of this file, between Apr 2, 2026 and Apr 28, 2026, about one every 26 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260428.81ea2d2 latest | 2026-04-28 | 81ea2d2 | 11,896 B | A | view · diff |
| git:20260402.86565be | 2026-04-02 | 86565be | 12,010 B | A | view |
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Source
jaechang-hits/sciagent-skills · 381 stars · license a license file GitHub does not identify · pushed 2026-10-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f5fglfn2nrikuqup GET https://markdownregistry.com/api/v1/resolve?ref=jaechang-hits/sciagent-skills/statistical-significance-annotation GET https://markdownregistry.com/api/v1/blob/1764541ea615b38b4447d15c94a9f84e360949e0864b7cc988e49e4152330023
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