Data cleaning courses can help you learn techniques for identifying and correcting errors in datasets, handling missing values, and standardizing data formats. You can build skills in data validation, outlier detection, and transforming raw data into a usable format. Many courses introduce tools like Python libraries such as Pandas and NumPy, as well as software like OpenRefine, that support executing data cleaning tasks efficiently and ensuring data quality for analysis.

New York University
Skills you'll gain: Reinforcement Learning, Financial Trading, Financial Market, Derivatives, Markov Model, Risk Modeling, Financial Modeling, Portfolio Management, Model Optimization, Market Dynamics, Machine Learning, Machine Learning Algorithms
★ 3.6 (134) · Advanced · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Scientific Visualization, NumPy, Data Visualization, Debugging, Matplotlib, Numerical Analysis, Engineering Calculations, Code Reusability, Integrated Development Environments, Computational Thinking, Engineering Analysis, Programming Principles, Data Analysis, Computer Programming, Model Optimization
★ 4.8 (22) · Beginner · Course · 1 - 4 Weeks
Stanford Online
Skills you'll gain: Bayesian Network, Applied Machine Learning, Machine Learning Algorithms, Bayesian Statistics, Machine Learning Methods, Markov Model, Statistical Machine Learning, Machine Learning, Network Model, Unsupervised Learning, Statistical Modeling, Model Training, Probability Distribution, Model Optimization, Statistical Methods, Probability & Statistics, Algorithms
★ 4.6 (305) · Advanced · Course · 1 - 3 Months

Arizona State University
Skills you'll gain: Experimentation, Statistical Analysis, Statistical Methods, Statistical Hypothesis Testing, Variance Analysis, Data Analysis, Sample Size Determination, Statistical Modeling
★ 4.8 (85) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Model Training, Model Evaluation, Predictive Modeling, Data Ethics, Algorithms, Machine Learning, Predictive Analytics, Responsible AI, Artificial Intelligence, AI literacy, Machine Learning Algorithms, Data Collection, Ethical Standards And Conduct, Computational Thinking, Economics
★ 4.7 (583) · Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Tidyverse (R Package), Data Wrangling, R (Software), Data Cleansing, Data Transformation, Data Manipulation, R Programming, Data Science, Exploratory Data Analysis, Data Analysis, Data Management, File Management, Data Visualization, Data Import/Export
★ 4.4 (54) · Beginner · Course · 1 - 3 Months

Wesleyan University
Skills you'll gain: Regression Analysis, Logistic Regression, Statistical Methods, Statistical Analysis, Statistical Modeling, Data Analysis, Correlation Analysis, SAS (Software), Statistical Programming, Statistical Inference, Predictive Modeling, Model Evaluation, Python Programming
★ 4.4 (274) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Meta Ads Manager, Data Storytelling, Data Presentation, Business Metrics, Key Performance Indicators (KPIs), Marketing Analytics, Data-Driven Marketing, Bayesian Statistics, Data Visualization, Descriptive Statistics, Marketing Effectiveness, Statistical Hypothesis Testing, Target Audience, Pandas (Python Package), Data Analysis, Data Visualization Software, A/B Testing, Data Collection, Marketing, Interviewing Skills
★ 4.7 (4.5K) · Beginner · Professional Certificate · 3 - 6 Months

Skills you'll gain: React Native, Android Studio, Restful API, User Research, Version Control, GitHub, UI/UX Research, Usability Testing, Jest (JavaScript Testing Framework), Git (Version Control System), Data Structures, Kotlin, Android Jetpack, Android Development, Unix Commands, Persona (User Experience), Interaction Design, Mobile Development, Code Reusability, Javascript
★ 4.6 (9.3K) · Beginner · Professional Certificate · 3 - 6 Months

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Scala Programming, User Interface (UI), Leaflet (Software), Data Processing, Interactive Data Visualization, Scientific Visualization, Big Data, Visualization (Computer Graphics), Geospatial Mapping, Data Manipulation, Data Transformation, Apache Spark, Spatial Data Analysis, Computer Graphics
★ 4.4 (547) · Mixed · Course · 1 - 3 Months

Universidad de los Andes
Skills you'll gain: Technical Analysis, Portfolio Management, Advanced Analytics, Financial Data, Investments, Financial Forecasting, Financial Trading, Investment Management, Financial Analysis, Financial Market, Risk Modeling, Financial Modeling, Analytics, Portfolio Risk, Predictive Analytics, Capital Markets, Performance Measurement, Time Series Analysis and Forecasting, Statistical Analysis, Market Trend
★ 4.7 (229) · Intermediate · Specialization · 1 - 3 Months

Amazon Web Services
Skills you'll gain: AWS Identity and Access Management (IAM), Amazon CloudWatch, Amazon Web Services, Serverless Computing, Identity and Access Management, Amazon DynamoDB, Amazon Elastic Compute Cloud, Cloud Computing, Amazon S3, Scalability, Cloud Infrastructure, Event-Driven Programming, Data Migration, Cloud Security, Cloud Storage, Cloud Management, Solution Architecture, Cloud Computing Architecture, Cloud Services, Cloud Solutions
★ 4.8 (6.9K) · Beginner · Specialization · 1 - 3 Months