quantitative-analysis SKILL.md skillA
quantitative-analysis from cbrock84/headcount is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cbrock84/headcount/quantitative-analysis@git:20260916.e72e404Pins git:20260916.e72e404 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cbrock84/headcount
- Path
plugins/data-analytics/skills/quantitative-analysis/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260916.e72e404, committed Sep 16, 2026
- First version recorded
- Sep 1, 2026
- Size
- 5,029 bytes
- Repository stars
- 2,543
- License
- MIT
Answers a business question with data without fooling yourself — framing the question so an answer would change something, choosing the right comparison, checking the data before trusting it, recognizing the traps that produce confident wrong answers (aggregation reversals, survivorship, regression to the mean, multiple comparisons), and reporting uncertainty honestly. Use this to run an analysis, review one before acting on it, or work out why two people looking at the same data reached…
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
# Quantitative analysis A wrong answer here is rarely an arithmetic error. It is a correct calculation on the wrong comparison, or on data that does not mean what the field name suggests. ## Frame the question so that an answer changes something Start from the decision. "How is retention doing" has no answer; "is the cohort we changed onboarding for retaining better than the one before it, enough to justify rolling it out" does. Write down what you expect to find and what you would do in each case before you look. If every possible result leads to the same action, the analysis is not worth running — and knowing that in advance is worth more than the analysis would have been. ## Choose the comparison before the metric Almost every meaningful number is a comparison, and the choice of what to compare against does more work than the calculation. - **Against what it was** — needs a period long enough to see through seasonality and noise. - **Against what it would have been** — the strongest comparison and the hardest to construct. A holdout group, a matched segment, a pre-trend extended forward. …
Read the whole file at its exact version.
How to install
mdr add cbrock84/headcount/quantitative-analysis@sha256:9b76a488da83b253The line at the top of this page pins the label git:20260916.e72e404, 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_x5yh63umoowhuqop)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 1, 2026 and Sep 16, 2026, about one every 15 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260916.e72e404 latest | 2026-09-16 | e72e404 | 5,029 B | A | view · diff |
| git:20260901.3f04dfc | 2026-09-01 | 3f04dfc | 4,690 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5029 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
cbrock84/headcount · 2,543 stars · license MIT · pushed 2026-10-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_x5yh63umoowhuqop GET https://markdownregistry.com/api/v1/resolve?ref=cbrock84/headcount/quantitative-analysis GET https://markdownregistry.com/api/v1/blob/9b76a488da83b2533d9e2c1e8365924c9085dd294828f3644f7647c6ac92a98b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.