START HERE — APPLIED DATA ANALYSIS / MODULE 01
From business questions to an analysis plan. Five lessons; 255 suggested minutes including practice.
Begin with case_brief.txt, then the dictionary and tickets.csv. Use a text editor plus a calculator or any local spreadsheet. No Python, SQL, account, upload or purchase is required.
Work through learner_worksheet.txt. Complete analysis_plan_template.txt and metric_contract_template.txt. Try your work before opening worked_solutions.txt, worked_analysis_plan.html or expected_results.json. Use review_rubric.txt for self-review.
The HTML worked plan is an offline document, with relative links to evidence; extract practice_pack.zip into a folder to preserve those links. It has no forms, tracking, external requests or stored progress. The CSV is prepared source data with meaningful documented blanks, not a cleaning challenge. No private data is supplied.
This is a new fictional Harbor Helpdesk case, not the Northstar Shop extract. Timestamps use UTC, fixed snapshot 22 June 2026 00:00. Module 1 is complete and free; later Applied modules are not published by this pack. Public registration and online payments remain disabled.
Content version 2026-10-15.1. Educational practice, no employment/accreditation/business outcome guarantee. Report corrections to support@datacareerhub.io. Do not upload these materials as customer work or run any exercise against a production database.
