# kramabench / kramabench-environment-hard-7

- taskset: [kramabench](https://harnessreport.com/tasks/kramabench.md)
- difficulty: hard
- category: data-science
- language: 
- runnable from the site: no
- agent timeout: 600s

## Results by harness

_none yet_

## Instruction

```
Under `/app/data`, consider the following files for analysis:
* environmental-justice-populations.csv
* malibu_beach_datasheet.csv
* monthly_precipitations_boston.csv
* monthly_precipitations_chatham.csv
* water-body-testing-2014.csv
* water-body-testing-2016.csv
* water-body-testing-2018.csv
* water-body-testing-2021.csv
* water-body-testing-2023.csv
* wollaston_beach_datasheet.csv

What was the difference in bacterial exceedance rates (to 2 decimal places) for marine beach samples collected in 2023 between communities with more than 50% environmental justice (EJ) populations and those with less than 25% EJ populations?

Save your EXACT NUMERIC answer AND NOTHING ELSE in the file `/app/answer.txt`.
```
---
Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp