Introduction to Descriptive Statistics

Descriptive statistics provide simple, quantitative summaries of datasets, usually combined with descriptive graphics. After data collection, the first step is to get basic information of the data using descriptive statistics. This provides easy-to-understand information that helps answer basic questions based on the average, spread, deviation of values and so on. They give analysts a rough idea about what the data is indicating so that later they can perform more formal and targeted analyses.

What is ETL (Extract, Transform, Load)?

An organization has built various systems over the years, and these systems are on numerous platforms with different architectures. Data in these systems is in varied formats like SAP, Excel, flat files, databases, web services, cloud applications, unstructured data, etc. Also, information all over the organization’s departments is scattered in these various systems. Now the management wants to build a new report or application which requires inputs from these multiple systems. How can this data from different systems and different formats be joined together for seamless access for analysis and reporting?

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