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
- 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
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Operations Research and Optimization - DesignBeginnerNew
Redesign Weekly Production Scheduling for a Munich Craft Brewery
Using the historical demand dataset, the production-constraints specification, and the current-operations snapshot provided, design a single weekly production schedule for the t…
- Process Analysis
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Open coursework - AnalysisFoundationalNew
Pricing Strategy for a Sustainable Fashion Brand
You are a pricing analyst at EcoWear. Using the survey data (simulated with 500 responses) and competitor prices, perform a conjoint analysis or price elasticity analysis. Deter…
- Data Analysis
- Statistics
- Data Visualization
Open coursework - 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
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Open coursework Practice your coursework on real scenarios.
Every challenge is shaped from real-world context — not generic exercises. The work mirrors what your degree prepares you for.
Why Ewance
- 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
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Investment Analysis and Portfolio Management - AnalysisIntermediateNew
Social Preferences in a 40-Person SaaS Scale-Up
You are an internal behavioral economist at TaskFlow. Analyze the current compensation structure (50% base, 50% individual commission) and its behavioral pitfalls. Propose a new…
- Incentive Design
- Game Theory
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Open coursework - DesignIntermediateNew
Design a Crisis Information-Flow Analysis for a Newsroom
Using the sampled propagation log and the editorial brief in the provided materials, design and partially demonstrate an analysis that reconstructs the alert's 72-hour spread as…
- Computational Journalism
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Open coursework - AnalysisSeniorNew
Process Mining for Order-to-Cash in a Mid-Size Manufacturing Firm
Your task is to analyze the provided event log using process mining software (e.g., Disco, Celonis, or ProM). Discover the as-is process model, identify bottlenecks, rework loop…
- Process Mining
- Event Log Analysis
- Bpmn Modeling
Business Process Management - Browse challenges
Explore role
Product Manager
Ship product that solves real user problems. Combine user research, prototyping, and stakeholder alignment to turn ambiguous briefs into measurable wins — the role at the centre of modern software teams.
- StrategyBeginnerNew
Design a Weekly Dynamic Pricing Strategy for GlowVienna
Design a weekly dynamic pricing strategy for GlowVienna's flagship serum that the team could realistically operate. Ground your work in the three materials provided: the histori…
- Pricing Strategy
- Demand Forecasting
- Data Analysis
Open coursework - StrategyBeginnerNew
Simulation-Based Customer Success Staffing Plan for Flowly
Using the historical ticket log, the growth-scenarios brief, and the current-operations and service-level specification provided to you, build a discrete-event simulation of Flo…
- Simulation
- Capacity Planning
- Scenario Analysis
Open coursework - AnalysisIntermediateNew
Decarbonizing a 40-Person SaaS Scale-Up's Supply Chain
As a carbon management analyst, you must quantify CloudSync's current carbon footprint (Scope 1, 2, 3), identify reduction levers, and propose a roadmap to carbon neutrality. Co…
- Carbon Footprinting
- Scope 3 Emissions
- Renewable Energy
Open coursework - 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
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Open coursework Build a verifiable portfolio.
Submissions become evidence. Reviewers with shipping experience score against a rubric; the result becomes a credential anyone can verify.
Why Ewance
- AnalysisIntermediateNew
Detect Coordinated Inauthentic Behavior on a National News Platform
Receive an anonymized 90-day export of comments (user_id, article_id, timestamp, like_count, reply_to_id) and basic user metadata (registration date, login pattern bucket). Buil…
- Network Science
- Community Detection
- Graph Analysis
Open coursework - AnalysisBeginnerNew
Optimizing Ad Spend for a D2C Cosmetics Brand
You are a data analyst at Glow & Grow. Using the provided dataset (simulated), perform an exploratory data analysis to understand trends in ad performance. Build a regression mo…
- Data Analysis
- Regression
- Data Visualization
Open coursework - AnalysisIntermediateNew
Pivot or Persevere for a Food-Tech Startup
Your team has one week to analyze provided customer data (acquisition channels, churn rates, unit economics) and market research on the B2B office food market. Deliver a recomme…
- Data Analysis
- Unit Economics
- Business Model Canvas
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 - 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 - AnalysisBeginnerNew
Redesign Glow Naturals' Mumbai Last-Mile Delivery Network
Using the delivery records in 'GN-DELIVERY-LOG', the operational account in 'GN-OPS-FILE', and the unit costs and constraints in 'GN-COST-AND-CONSTRAINTS', diagnose where Glow N…
- Route Optimization
- Cost Benefit Analysis
- Supply Chain Design
Open coursework - StrategyBeginnerNew
Design an Inclusive Engineering Hiring Plan for a Boston SaaS Scale-Up
Using the twelve-month applicant funnel dataset and the current-process case file provided, audit where DataFlow's engineering pipeline loses underrepresented candidates and why…
- Diversity And Inclusion Strategy
- Recruitment Audit
- Bias Mitigation
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 - AnalysisIntermediateNew
Vehicle-to-Everything (V2X) Communication Trial Analysis
Load the anonymised dataset (logged packet RX/TX, PC5 sidelink RSSI, RSRP, SINR, vehicle trajectory, application latency for safety messages). Compute the canonical 3GPP Release…
- C V2x
- Pc5 Sidelink
- Wireless Performance Analysis
Open coursework - AnalysisIntermediateNew
Forecasting Churn for a SaaS Scale-Up
You are a data scientist intern at TaskFlow. Using the provided dataset, perform feature engineering and build a logistic regression or decision tree model to predict churn. Ide…
- Data Analysis
- Regression
- Classification
Open coursework - DesignBeginnerNew
Optimizing Inventory for a São Paulo D2C Cosmetics Brand
You are given a CSV file with raw sales, inventory, and supplier data. Your task is to design an E/R diagram, create the normalized relational schema in 3NF, populate it with sa…
- SQL
- Database Design
- Normalization
Open coursework - ResearchIntermediateNew
Testing Market Efficiency in European Tech IPOs
Your task is to collect daily stock prices for 30 European tech IPOs from the first 60 trading days post-listing. Compute cumulative abnormal returns (CAR) using a market model …
- Event Study
- Abnormal Returns
- Market Model
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.



















































































