Numerical data simply means Numbers or integers. This can be achieved by various techniques such as data visualization and manipulation. A sample of data is used as a basis for making a conclusion about that population. We are extracting some sample of data from population data, and from that sample of data, we are inferencing something(driving conclusion) for population data. It is important to remember that descriptive statistics can be performed on a sample and population data but we will never get or use population data. All kind of interpretation and visualization is part of descriptive statistics. We analyze the data using different plots and charts on different kinds of data(numerical and categorical) like bar plots, pie charts, scatter plots, histograms, etc. Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.ĭescriptive statistics is understanding, analyzing, and summarizing the data in form of numbers and graphs.
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