MIS 3063 CH 8 – Flashcards
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Which of the following problems is particularly common for data that have been gathered over time?
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lack of consistency
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In the ________ phase, a BigData collection is broken into pieces and hundreds or thousands of independent processors search these pieces for something of interest
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map
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________ is the application of statistical techniques to find patterns and relationships among data for classification and prediction
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Data mining
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Which of the following statements is true of a data warehouse?
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A data warehouse is larger than a data mart
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The goal of ________, a type of business intelligence analysis, is to create information about past performance
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reporting analyses
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________ are user requests for particular business intelligence results on a particular schedule or in response to particular events
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Subscriptions
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The results generated in the map phase are combined in the ________ phase
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reduce
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The more attributes there are in a sample data, the easier it is to build a model that fits the sample data, but that is worthless as a predictor. Which of the following best explains this phenomenon?
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the curse of dimensionality
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________ are business intelligence documents that are fixed at the time of creation and do not change
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Static reports
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The use of an organization's operational data as the source data for a business intelligence system is not usually recommended because it ________.
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requires considerable processing and can drastically reduce system performance
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Regression analysis is used in ________.
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supervised data mining
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A ________ is designed to extract data from operational systems and other sources, clean the data, and store and catalog that data for processing by business intelligence tools
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data warehouse
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Which of the following statements is true of Hadoop?
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Hadoop is an open source program that implements MapReduce
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________ is used to measure the impact of a set of variables on another variable during data mining
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Regression analysis
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Users in a data mart obtain data that pertain to a particular business function from a ________.
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data warehouse
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________ is an open source program supported by the Apache Foundation that manages thousands of computers and that implements MapReduce
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Hadoop
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Which of the following statements is true of business intelligence (BI) systems?
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Business intelligence systems analyze an organization's past performance to make predictions
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Which of the following is a fundamental category of business intelligence (BI) analysis?
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reporting
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________ is the process of sorting, grouping, summing, filtering, and formatting structured data
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Reporting analysis
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Which of the following statements is true of unsupervised data mining?
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Analysts create hypotheses only after performing an analysis
