Analyzing raw data- for better understanding of business and to make better business required decisions. Manipulating/cleaning data, Working on relational database/ connecting multiple data sources Performing math/statistical functions on the data and apply algorithms or data models. Preparing data for analysis by removing or modifying data that is incorrect, incomplete, irrelevant, duplicated, or improperly formatted. Performing Statistical methods are used in data analysis: descriptive statistics, which summarize data from a sample using indexes such as the mean or standard deviation, and inferential statistics, which draw conclusions from data that are subject to random variation