1. The document discusses the scope of business analytics, including descriptive analytics which uses data to understand past performance, predictive analytics which seeks to predict the future by examining patterns in historical data, and prescriptive analytics which uses optimization to identify the best alternatives. 2. It defines data sets as collections of data and databases as collections of related files containing records on people, places or things. Big data is characterized by its large volume, variety, velocity and veracity. 3. Decision models are logical or mathematical representations of business problems or situations that can be used to analyze or facilitate decision making. They include constant data, uncontrollable variables, and controllable decision variables.