# dacode / dacode-data-sa-050 - taskset: [dacode](https://harnessreport.com/tasks/dacode.md) - difficulty: medium - category: data-science - language: - runnable from the site: no - agent timeout: 600s ## Results by harness _none yet_ ## Instruction ``` All input files are under `/app`. Save your output file(s) under `/app/output`. With a random seed of 42, randomly select 100 data points from the dataset and conduct a Z-test on Canada's CO2 emission data. Determine if the sample mean significantly differs from the population mean at a 0.05 significance level. Based on the Z-value, choose between "Fail to reject null hypothesis" and "reject null hypothesis." Format your findings as follows: """ { "Z-value": [...], "Sample Mean": [...], "Sample Standard Deviation": [...], "result": [...] } """ Save the json answer in `/app/output/answer.json`. ``` --- 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