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Contra - A professional network for the jobs and skills of the futureCleaned and validated a large real-world online retail dataset to create a more reliable, analysi...

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Tanra Johnson

pro

• Aug 31

Cleaned and validated a large real-world online retail dataset to create a more reliable, analysis-ready transaction set. The process included identifying and removing 5,268 duplicate records, identifying 9,251 cancelled transactions, reviewing non-positive quantity and price values, and filtering the dataset to 524,879 valid transaction records.

The project demonstrates practical Excel data-cleaning skills, including duplicate detection, filtering, data-quality checks, transaction validation, and maintaining separate raw and cleaned datasets for accuracy and traceability.

Data Analysis Microsoft Excel Processing

Sondarva Vijay

• Aug 28

if someone need excel realeted work please contect me .

Data Analysis Web Scraping Microsoft Excel Excel VBA Microsoft Word

Tahira Maryam

• Aug 28

Customer Retention & Cohort Analysis Performed an advanced cohort retention analysis using sample customer data to evaluate retention patterns across acquisition cohorts. The analysis highlights customer behavior over time and helps identify retention trends and potential churn risks through data visualization.

Data Science Data Visualization Microsoft Excel

Mo Rahman

• Aug 29

Cohorts are the right lens here. One useful guardrail is comparing cohorts at identical ages and separating acquisition-channel mix from within-cohort retention; otherwise a newer cohort can look weaker simply because it has had less time to mature. Nice foundation for making churn actionable.