excel-weighted-mean SKILL.md skillA
excel-weighted-mean from cxcscmu/skilllearnbench is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cxcscmu/skilllearnbench/excel-weighted-mean@git:20260424.d50cf5aPins git:20260424.d50cf5a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cxcscmu/skilllearnbench
- Path
skills/b1-one-shot-claude-sonnet-4-6/weighted-gdp-calculation/excel-weighted-mean/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260424.d50cf5a, committed Apr 24, 2026
- Size
- 2,599 bytes
- Repository stars
- 91
- License
- MIT
Calculating GDP-weighted means and other weighted statistics in Excel using SUMPRODUCT, including net exports as percent of GDP.
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
# Excel Weighted Mean with SUMPRODUCT ## Overview A weighted mean assigns different weights to each observation. In economic analysis, GDP-weighted averages give more influence to larger economies. ## Formula ```excel =SUMPRODUCT(values_range, weights_range) / SUM(weights_range) ``` ## Example: GDP-Weighted Net Exports % GDP ```excel =ROUND(SUMPRODUCT(H35:H40, H26:H31) / SUM(H26:H31), 1) ``` Where: - `H35:H40` — net exports as % of GDP for each country (already in percentage form, e.g., 12.3 means 12.3%) - `H26:H31` — GDP values in billions (used as weights) - Result is automatically in the same scale as the input values (12.3 form, not 0.123) ## Scale Consistency If values in H35:H40 are stored as 12.3 (percent form), the weighted mean formula returns the result in the same 12.3 form — no additional multiplication by 100 is needed. ## Net Exports as Percent of GDP ```excel =ROUND((Exports - Imports) / GDP * 100, 1) ``` Example where exports are in row 12, imports in row 19, GDP in row 26: ```excel =ROUND((H12 - H19) / H26 * 100, 1) ``` ## Related Statistical Functions All rounded to 1 decimal for consistency: ```excel …
Read the whole file at its exact version.
How to install
mdr add cxcscmu/skilllearnbench/excel-weighted-mean@sha256:4430f3e07b775adfThe line at the top of this page pins the label git:20260424.d50cf5a, 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_iullez2uzx7iijvn)
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Versions
The registry has recorded 1 version of this file, committed on Apr 24, 2026.
Audit of the latest version
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Source
cxcscmu/skilllearnbench · 91 stars · license MIT · pushed 2026-10-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_iullez2uzx7iijvn GET https://markdownregistry.com/api/v1/resolve?ref=cxcscmu/skilllearnbench/excel-weighted-mean GET https://markdownregistry.com/api/v1/blob/4430f3e07b775adf570d39ceebc43ae3d9caae7e26658e15ad36e01e90d5604f
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.