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MIS 3063 CH 8

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

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