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A data scientist is an individual, organization or application that performs statistical analysis, data mining and retrieval processes on a large amount of data to identify trends, figures and other relevant information.
A data scientist performs data analysis on data stored in data warehouses or data centers to solve a variety of business problems, optimize performance and gather business intelligence.
Data scientists generally analyze big data, or data depositories that are maintained throughout an organization or website's existence, but are of virtually no use as far strategic or monetary benefit is concerned. Data scientists are equipped with statistical models and analyze past and current data from such data stores to derive recommendations and suggestions for optimal business decision making.
Data scientists are mainly part of the marketing and planning process to identify useful insights and derive statistical data for planning, executing and monitoring result-driven marketing strategies.