Data Sciences Challenges
Explore data science challenges on Ewance to build skills employers expect from analysts and ML engineers. Work through challenges on data cleaning, exploratory analysis, modeling, and storytelling with data.
Most Popular
- AnalysisFoundationalNew
Design a Go/No-Go CVP Model for EcoWear Activewear
Design a CVP decision model and proposal for EcoWear's biodegradable activewear line using only the EcoWear Activewear Cost & Assumptions Brief and the Comparable Activewear SKU…
- Cvp Analysis
- Break Even Analysis
- Sensitivity Analysis
Open coursework - AnalysisFoundationalNew
Optimize Ad Spend for Munich D2C Cosmetics Brand
You are given a CSV dataset with 10,000 rows of ad performance data including date, campaign, audience segment, creative type, impressions, clicks, conversions, and spend. Your …
- A B Testing
- Regression Analysis
- Data Cleaning
Open coursework - ResearchFoundationalNew
Optimizing Survey Design for a São Paulo D2C Cosmetics Brand
Your task is to design a complete survey research plan for Glow SP. Define the target population, sampling frame, and sample size. Create a 15-question survey (mix of closed and…
- Survey Design
- Sampling
- Questionnaire Construction
Open coursework - ResearchFoundationalNew
Diagnose GreenBite's Plant-Based Chicken Launch Readiness
Work only from the four items in the provided materials: the GreenBite launch-readiness case file, the draft consumer survey instrument left by the previous analyst, the nationa…
- Survey Design
- Data Analysis
- Consumer Behavior
Open coursework Develop in-demand professional skills.
Each challenge names the skills it strengthens. Over time, your profile fills with the competences a hiring manager would actually look for.
Why Ewance
- AnalysisFoundationalNew
Optimize EcoThreads' Local vs. Overseas Cotton Sourcing
Working only from the EcoThreads sourcing file (the de-identified internal record) and the supplier cost-and-emissions dataset, find the combination of local and overseas shirt …
- Cost Minimization
- Isoquant Isocost
- Carbon Footprint
Open coursework - AnalysisFoundationalNew
Controlling Inventory for a Sustainable Fashion Brand
Your task is to develop an inventory control system for EcoThreads. You must analyze historical sales data (provided in a CSV), identify patterns, propose KPIs (e.g., turnover r…
- Inventory Management
- Data Analysis
- KPI Definition
Principles of Management - CodeFoundationalNew
Optimizing Inventory for a Barcelona D2C Cosmetics Brand
You are given a CSV file with 6 months of daily sales data for 20 SKUs, including product name, date, units sold, and current stock level. Your task is to write a Python program…
- Python
- Data Cleaning
- Data Analysis
Open coursework - StrategyFoundationalNew
Build a Stakeholder Engagement Plan for Barcelona's Smart Traffic Rollout
Working only from the materials provided, produce a stakeholder engagement plan for the smart traffic program. Read the program charter to fix the project's scope, budget envelo…
- Stakeholder Management
- Communication Planning
- Conflict Resolution
Open coursework - Browse challenges
Explore role
Strategy Analyst
Frame the business question, model the options, build the recommendation. From market sizing to competitive analysis, this role is where strategy consulting meets in-house decision-making.
- StrategyFoundationalNew
Restructure GreenMart's Store Sales Force to Lift Upselling
Using the provided transaction-level sales export, the staff roster and turnover record, and the store-visit field notes, build a sales force restructuring plan for GreenMart's …
- Sales Force Analysis
- Incentive Design
- Training Program Design
Open coursework - AnalysisFoundationalNew
Diagnose and Fix the BrilhoBeleza Customer Journey
Working only from the four materials you are given — the company context brief, the digital funnel analytics export, the post-purchase survey results, and the session observatio…
- Customer Journey Mapping
- Data Analysis
- Ux Research
Open coursework - AnalysisFoundationalNew
Investigate Price Sensitivity for GlowSydney's New Moisturizer
Working solo, begin by exploring the GlowSydney transaction history (provided as the dataset 'glowsydney-transactions') to summarize how prices and units sold are distributed, u…
- Descriptive Statistics
- Linear Regression
- Data Visualization
Open coursework - StrategyFoundationalNew
ESG Strategy for a 40-Person SaaS Scale-Up
Develop a one-page ESG strategy dashboard with 5-7 key performance indicators (KPIs) relevant to a SaaS company, including data collection methods and a 6-month implementation p…
- ESG Reporting
- Sustainability Metrics
- Stakeholder Engagement
Sustainability and Sustainable Business Get recognized by recruiters and employers.
Credentials are blockchain-anchored via LearnCoin — tamper-evident, portable, link-shareable on LinkedIn and beyond.
Why Ewance
- AnalysisFoundationalNew
Sentiment Analysis for Tel Aviv D2C Cosmetics Brand
You are provided with a dataset of 10,000 customer reviews (in English) with no labels. Your task is to preprocess the text, develop a sentiment classification model using NLP t…
- Text Preprocessing
- Sentiment Analysis
- Classification
Open coursework
How it works
From brief to credential, in six steps.
Step 01
Browse challenges aligned to your studies.
Step 02
Accept the one that fits your goals.
Step 03
Work through it with AI Copilot guidance.
Step 04
Submit for structured evaluation.
Step 05
Earn a verified credential.
Step 06
Add it to LinkedIn with one click.
Industry teams behind a decade of practitioner briefs
Hiring from this pool?
Sponsor a challenge and meet candidates through actual work.
Industry teams can shape briefs around the skills they hire for, then evaluate students on rubric-scored deliverables — not resumes.