Localized reading guide

statistical-analysisPurpose, usage and source

Apply statistical methods including descriptive stats, trend analysis, outlier detection, and hypothesis testing. Use when analyzing distributions, testing for significance, detecting anomalies, computing correlations, or interpreting statistical results.

Source retrieved: 2026-10-29

Source repository: anthropics/knowledge-work-plugins
SKILL.md: data/skills/statistical-analysis/SKILL.md
Repository stars: 34,049
Repository updated: 2026-10-30
Categories: Development
Last collected: 2026-10-31 10:38 UTC+08:00

License: License file needs review

Source SKILL.md

Workflow excerpts are reading aids, not executable instructions from Codez. No third-party Skill was run to produce this page.

The purpose and workflow passages below are upstream material, organized and translated for reading. They are distinct from the separately labeled Codez editorial analysis.

What this Skill does

How the upstream workflow works

When to Use

Use hypothesis testing when you need to determine whether an observed difference is likely real or could be due to random chance. Common scenarios: A/B test results: Is variant B actually better than A? Before/after comparison: Did the product change actually move the metric? Segment comparison: Do enterprise customers really have higher retention?

Upstream passage · L157 ↗

Statistical Analysis Skill

Descriptive statistics, trend analysis, outlier detection, hypothesis testing, and guidance on when to be cautious about statistical claims.

Upstream passage · L7 ↗

Central Tendency

Choose the right measure of center based on the data: Always report mean and median together for business metrics. If they diverge significantly, the data is skewed and the mean alone is misleading.

Upstream passage · L13 ↗

Upstream passage · ↗

p1:   Bottom 1% (floor / minimum typical value)
p5:   Low end of normal range
p25:  First quartile
p50:  Median (typical user)
p75:  Third quartile
p90:  Top 10% / power users
p95:  High end of normal range
p99:  Top 1% / extreme users

Requirements and setup

No short requirements passage was selected from this file. This does not mean the Skill has no dependencies. Check the repository setup instructions and referenced files.

Limits and quality checks

No separate limits passage was selected from this file. This does not mean the Skill is safe for every input or environment. Review the complete source and validate your own result.

Start with a safe trial

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Try the source workflow in a disposable project or on a copy. Review operations that change files, remote services or billable resources before allowing them.
Validate the output against the source quality checks and your own requirements. A successful trigger or a high repository Star count does not establish a correct result.

Skill format and directory specification ↗

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Translation and scope

This reading guide selects passages from the pinned upstream SKILL.md. Translation is assisted. It is not a complete manual or a claim of tested compatibility. Read the original and its referenced files before use.

This introduction refers to the pinned version below; current repository activity and collection time are shown separately.

Pinned source: Read the original ↗
Source retrieved: 2026-10-29T09:32:23Z
Source commit: 2574e29377c7173d0cecffef29a6ecbd7f8ccb5d
Source SHA-256: 91a15cfc144efffcd622b09827362a73993a3ff30e3a78114801832477c9f8a0

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