Data Analyst Data AnalystData Analysis FundamentalsExploratory Data AnalysisDescriptive StatisticsData VisualizationData Cleaning and PreparationStatistical AnalysisProbability TheoryHypothesis TestingRegression AnalysisTime Series AnalysisANOVA (Analysis of Variance)Data Manipulation and QueryingSQL (Structured Query Language)Data WranglingData TransformationData AggregationData Querying and FilteringData VisualizationCharts and GraphsDashboard DesignInfographicsData StorytellingVisualization Tools (e.g., Tableau, Power BI, matplotlib)Data Tools and TechnologiesExcelPython Libraries (e.g., Pandas, NumPy, Matplotlib)R ProgrammingSQL Databases (e.g., MySQL, PostgreSQL)Big Data Technologies (e.g., Hadoop, Spark)Machine Learning and Predictive AnalyticsSupervised LearningUnsupervised LearningModel Evaluation and SelectionFeature EngineeringClassification and Regression ModelsBusiness and Domain KnowledgeUnderstanding Business ContextDomain-specific KnowledgeKey Performance Indicators (KPIs)Business Metrics and ReportingIndustry-specific Data Analysis Techniques