statistical-analysis

statistical-analysis is a skill for Claude Code from MonumentalSystems/Atlas-Agent-Teams. It costs 25 tokens per session (1,364 once invoked), scanned A, original, MIT.

A reference for statistical methods, including ways to summarize data, test claims, compare groups, study time-based data, and design experiments.

In plain words
What is it for?
Use it for descriptive statistics, hypothesis tests, A/B tests, time series analysis, probability distributions, and experimental design.
Why use it?
It helps choose suitable analyses and interpret results such as confidence intervals, p-values, statistical power, and effect sizes.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the data-science plugin — 4 skills, 1 command, 5 agents shipped together

Good fit Use it for descriptive statistics, hypothesis tests, A/B tests, time series analysis, probability distributions, and experimental design.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/monumentalsystems/atlas-agent-teams/statistical-analysis
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add MonumentalSystems/Atlas-Agent-Teams --skill statistical-analysis
Clone the repo
git clone --depth 1 https://github.com/MonumentalSystems/Atlas-Agent-Teams

Made for: Claude Code.

Or install data-science, the plugin that ships this one along with the rest of its 4 skills, 1 command, 5 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for statistical-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/monumentalsystems/atlas-agent-teams/statistical-analysis/github.svg)](https://agentmods.dev/skills/monumentalsystems/atlas-agent-teams/statistical-analysis)
Your own site
<a href="https://agentmods.dev/skills/monumentalsystems/atlas-agent-teams/statistical-analysis"><img src="https://agentmods.dev/badge/skills/monumentalsystems/atlas-agent-teams/statistical-analysis/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for statistical-analysis

Your own site · 80×15
<a href="https://agentmods.dev/skills/monumentalsystems/atlas-agent-teams/statistical-analysis"><img src="https://agentmods.dev/badge/skills/monumentalsystems/atlas-agent-teams/statistical-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,364 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00025 $0.01364
Opus 5 $0.00013 $0.00682
Sonnet 5 $0.00005 $0.00273
Haiku 4.5 $0.00003 $0.00136

Measured 9d ago against content hash 131506b62fc6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

statistical-analysis scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

teams/data-science/skills/statistical-analysis/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Statistical Analysis

Statistical Methods and Tests

Descriptive Statistics

  • Measures of Central Tendency: Mean, median, mode
  • Measures of Dispersion: Variance, standard deviation, range, interquartile range
  • Distribution Shape: Skewness, kurtosis
  • Correlation: Pearson, Spearman, Kendall correlation coefficients
  • Covariance: Measure of joint variability

Probability Distributions

  • Normal Distribution: Bell curve, symmetric, defined by mean and standard deviation
  • Binomial Distribution: Number of successes in n independent trials
  • Poisson Distribution: Number of events in fixed interval
  • Exponential Distribution: Time between events in Poisson process
  • Chi-Square Distribution: Sum of squared normal variables

Inferential Statistics

  • Confidence Intervals: Range of values likely to contain population parameter
  • Hypothesis Testing: Formal procedure for testing claims about populations
  • p-values: Probability of observing results as extreme as current, assuming null hypothesis
  • Statistical Power: Probability of correctly rejecting false null hypothesis
  • Effect Size: Magnitude of difference or relationship

Hypothesis Testing

Hypothesis Structure

  • Null Hypothesis (H0): Default assumption, no effect or difference
  • Alternative Hypothesis (H1): Claim to be tested, effect or difference exists
  • Type I Error: Rejecting true null hypothesis (false positive)
  • Type II Error: Failing to reject false null hypothesis (false negative)
  • Significance Level (α): Threshold for rejecting null hypothesis (typically 0.05)

Common Statistical Tests

  • t-test: Compare means between two groups
    • One-sample t-test: Compare sample mean to known value
    • Independent t-test: Compare means of two independent groups
    • Paired t-test: Compare means of paired samples
  • ANOVA: Compare means across multiple groups
    • One-way ANOVA: Single factor
    • Two-way ANOVA: Two factors with interaction
  • Chi-Square Test: Test independence between categorical variables
  • Mann-Whitney U Test: Non-parametric alternative to t-test
  • Kruskal-Wallis Test: Non-parametric alternative to ANOVA

Read the full file on GitHub · 139 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 139 lines · 25 tokens per session scan A 131506b62fc6

Subscribe to this mod's changes

statistical-analysis is a skill published in the GitHub repository MonumentalSystems/Atlas-Agent-Teams (21 stars, last pushed 28d ago), licensed MIT. It adds 25 tokens to every session and 1,364 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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