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.
npx agentmods add skills/cxcscmu/skilllearnbench/excel-statistical-formulasnpx skills add cxcscmu/SkillLearnBench --skill excel-statistical-formulasgit clone --depth 1 https://github.com/cxcscmu/SkillLearnBenchWrote 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.
[](https://agentmods.dev/skills/cxcscmu/skilllearnbench/excel-statistical-formulas)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/excel-statistical-formulas"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/excel-statistical-formulas.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00024 | $0.01117 |
| Opus 5 | $0.00012 | $0.00558 |
| Sonnet 5 | $0.00005 | $0.00223 |
| Haiku 4.5 | $0.00002 | $0.00112 |
Grade A, and why
excel-statistical-formulas 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excel Statistical Formulas
Overview
Statistical functions in Excel calculate measures like mean, median, percentiles, and enable weighted calculations for economic data analysis.
Core Statistical Functions
Basic Descriptive Statistics
MIN - Returns the smallest value
=MIN(range)
=MIN(H35:L40)
MAX - Returns the largest value
=MAX(range)
=MAX(H35:L40)
MEDIAN - Returns the middle value
=MEDIAN(range)
=MEDIAN(H35:L40)
AVERAGE - Returns the arithmetic mean
=AVERAGE(range)
=AVERAGE(H35:L40)
Percentile Functions
PERCENTILE - Returns the kth percentile of a dataset
=PERCENTILE(range, k)
Where k is a decimal (0.25 for 25th percentile, 0.75 for 75th percentile)
Examples:
25th Percentile: =PERCENTILE(H35:L40, 0.25)
75th Percentile: =PERCENTILE(H35:L40, 0.75)
PERCENTILE.INC vs PERCENTILE.EXC:
- PERCENTILE.INC: Inclusive method (older PERCENTILE function)
- PERCENTILE.EXC: Exclusive method (newer, statistical best practice)
Weighted Mean Calculation
SUMPRODUCT for Weighted Mean
The SUMPRODUCT function multiplies corresponding elements in arrays and returns the sum of products.
Syntax:
=SUMPRODUCT(array1, array2, ...)
Weighted Mean Formula:
=SUMPRODUCT(values_array, weights_array) / SUM(weights_array)
Example: Weighted Mean of Net Exports by GDP Weight
=SUMPRODUCT(G35:G40, GDP_weights) / SUM(GDP_weights)
How it works:
- Multiply each value by its corresponding weight
- Sum all products
- Divide by sum of weights
Handling Multiple Columns
For data across multiple columns (like multiple years), you may need to:
- Flatten the data into single rows/columns, or
- Use array formulas with SUMPRODUCT
Example with multiple criteria:
=SUMPRODUCT((range1=criteria1)*(range2=criteria2)*values) / SUMPRODUCT((range1=criteria1)*(range2=criteria2)*weights)
Percentage Calculations
Converting to Percentage Display
Excel stores percentages as decimals (0.123 = 12.3%).
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.
- yesterday First seen · 173 lines · 24 tokens per session scan A 875a7a4fe3c7
excel-statistical-formulas is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 24 tokens to every session and 1,117 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 2026-09-03.
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