AI & Data
Statistics & Data Science Methods Challenges
Statistics & Data Science Methods challenges put you inside the work of drawing trustworthy conclusions from data. You'll build Statistics Fundamentals and Statistical Analysis, run Exploratory Data Analysis, Hypothesis Testing, Confidence Intervals, and Linear Regression, and design clean Sampling Methods.
From there you'll handle the harder edges — Bayesian methods, Causal inference, A/B testing with statistical significance, Monte Carlo Simulation, and Uncertainty Quantification — applying Experimental design the way data scientists actually do. Each challenge you solve earns a verified credential you can share with recruiters.
Recommended Challenges
· Data Analysis Clear- All
- Data Analysis
- Experimental design
- Simulation
- Exploratory Data Analysis
- Statistical Analysis
- Uncertainty Quantification
- Logistic regression
- Cost Modeling
- Hypothesis Testing
- Monte Carlo Simulation
- A/B testing with statistical significance
- Linear Regression
- Time series basics
- Bayesian methods
- Causal inference
- Sampling Methods
- 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
Marketing Research - AnalysisBeginnerNew
Optimizing Production Scheduling at a Munich Craft Brewery
Your task is to analyze historical demand data (provided) and current production constraints, then propose a weekly production schedule that minimizes total changeover time whil…
- Process Analysis
- Capacity Planning
- Scheduling
Operations Management - ResearchBeginnerNew
Optimizing Onboarding for a Fintech App
Your task is to analyze the current onboarding flow, identify drop-off points, and propose a redesigned onboarding experience. You will use user behavior data (provided in a sim…
- User Research
- Ux Design
- Data Analysis
Product Management - DesignSeniorNew
Social Security Compliance for a Remote-First Tech Company
As a compliance analyst, you must audit GlobalDev's current practices and propose a system for social security registration and contribution tracking across multiple EU jurisdic…
- Social Security Law
- EU Regulation
- Cross Border Compliance
Labor and Employment Law 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
- CodeIntermediateNew
AI-Driven Sales Lead Scoring for a B2B SaaS Scale-Up
You will receive a sample dataset of 200 leads with fields like company size, industry, email open rates, and website visits. Using AI tools, you must craft prompts to generate …
- Prompt Engineering
- Lead Scoring
- Data Analysis
Data-Driven Prototyping with AI - AnalysisBeginnerNew
Mobile Marketing Strategy for a Food Delivery App
Develop a mobile marketing strategy for QuickBite to improve user retention. Analyze provided user behavior data (e.g., session frequency, order history) to segment users. Desig…
- Mobile Marketing
- User Segmentation
- Push Notifications
Digital Marketing - AnalysisBeginnerNew
Optimizing Last-Mile Delivery for a Mumbai D2C Cosmetics Brand
Your task is to analyze Glow Naturals' current delivery data (provided in a simulated dataset) and design an optimized last-mile delivery strategy. You must consider factors lik…
- Route Optimization
- Cost Benefit Analysis
- Supply Chain Design
Operations and Supply Chain Management - AnalysisFoundationalNew
Competitive Response for a Lisbon D2C Cosmetics Brand
As a junior strategy consultant, analyze GlowLisboa's competitive position. Use Porter's Five Forces to assess industry attractiveness and competitor profiling to identify key t…
- Industry Analysis
- Competitor Profiling
- Strategic Thinking
Competitive and Competitor Analysis - 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.
- StrategyIntermediateNew
Rebuilding Trust After a Toxic Culture Scandal
Your task is to produce a comprehensive culture transformation proposal. Success means presenting a plan that addresses psychological safety, leadership accountability, and incl…
- Organizational Culture Diagnosis
- Change Management
- Employee Engagement
Organizational Behavior (Graduate) - AnalysisBeginnerNew
Dynamic Pricing for a Vienna D2C Cosmetics Brand
Your task is to develop a dynamic pricing model for GlowVienna's top-selling serum. You must analyze historical sales data (provided), competitor pricing, and demand patterns. P…
- Pricing Strategy
- Demand Forecasting
- Data Analysis
Pricing and Revenue Management - AnalysisBeginnerNew
Currency Risk Hedging for a German Exporter
You are a junior treasury analyst. Analyze the company's transaction exposure by reviewing historical exchange rate data and forecasted cash flows. Recommend a hedging strategy …
- Exchange Rate Analysis
- Financial Hedging
- Risk Management
International Economics - AnalysisIntermediateNew
Channel Partner Program for a Munich Industrial Sensor Manufacturer
Your task is to create a new channel partner program. You will analyze sales data from the past 2 years (provided in a CSV with 10,000 transactions) to identify top-performing p…
- B2B Marketing
- Channel Management
- Data Analysis
Business-to-Business Marketing Get recognized by recruiters and employers.
Credentials are blockchain-anchored via LearnCoin — tamper-evident, portable, link-shareable on LinkedIn and beyond.
Why Ewance
- AnalysisBeginnerNew
Optimizing Last-Mile Delivery for a New York D2C Cosmetics Brand
Your task is to evaluate the startup's current last-mile delivery operations using the SCOR model and propose improvements. Constraints: no capital expenditure for a private fle…
- Supply Chain Analysis
- Scor Model
- Logistics Optimization
Supply Chain Management - AnalysisIntermediateNew
Optimizing Portfolio for a Swiss Fintech Startup
Your task is to design a diversified portfolio of up to 8 ETFs from a provided universe of 10, maximizing the Sharpe ratio. You must present a clear rationale for your asset sel…
- Portfolio Optimization
- Modern Portfolio Theory
- Sharpe Ratio
Investment Analysis and Portfolio Management - CodeBeginnerNew
Optimizing Inventory for a Milan D2C Cosmetics Brand
You are provided with 12 months of daily sales data for 10 SKUs, including unit price, cost, lead time, and current inventory. Your task is to develop an Excel-based inventory o…
- Excel Modeling
- Vba Programming
- Demand Forecasting
Spreadsheet Modeling and VBA - AnalysisIntermediateNew
Resilience Analysis of a National Power-Distribution Network
Receive an anonymized topology of the medium-voltage network (4,200 nodes, 4,800 edges, each edge with capacity + age + redundancy flag). Build the network in NetworkX, compute …
- Network Science
- Graph Analysis
- Resilience Analysis
Network Science and Computational Social Science - CodeBeginnerNew
Optimizing Last-Mile Delivery for a Lisbon Grocery Startup
Your task is to build a linear programming model (or heuristic) to assign orders to vehicles and sequence deliveries. Success means reducing average route length by at least 15%…
- Linear Programming
- Python
- Route Optimization
Operations Analytics and Optimization - AnalysisFoundationalNew
Sales Force Restructuring for Regional Retail Chain
Your task is to produce a sales force restructuring plan for GreenMart. Deliverables include: (1) an analysis of current sales force performance (using provided sales data), (2)…
- Sales Force Analysis
- Incentive Design
- Training Program Design
Sales Management - AnalysisBeginnerNew
Optimizing Last-Mile Delivery for a San Francisco Grocery Startup
Your task is to formulate a minimum-cost flow problem for daily delivery routes. Use the provided order data (locations, time windows, volumes) and vehicle specs (capacity, spee…
- Linear Programming
- Network Flow
- Python
Operations Research and Optimization - AnalysisBeginnerNew
Pricing Strategy for a Copenhagen D2C Cosmetics Startup
Your task is to design a pricing strategy for GlowCopenhagen's vitamin C serum. You have access to a dataset of competitor prices, customer purchase history, and a survey on wil…
- Game Theory
- Pricing Strategy
- Market Analysis
Industrial Economics and Game Theory - AnalysisIntermediateNew
Auditing Bias in a Fintech Credit Scoring Model
Conduct a quantitative fairness audit using a public proxy dataset (e.g., the UCI Adult or Give Me Some Credit dataset re-framed as BNPL decisions) and apply at least three fair…
- Algorithmic Fairness
- Ai Audit
- Regulatory Analysis
AI, Ethics and Society - DesignBeginnerNew
Simulation-Based Capacity Planning for a 40-Person SaaS Scale-Up
Your task is to simulate Flowly's customer success operations over the next 12 months. Model the arrival of new enterprise customers, their onboarding and support requests, and …
- Simulation
- Capacity Planning
- Scenario Analysis
Business Analytics
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.



















































































