Ch8 – Data Mining Flashcards
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We have obtained access to the company's operational data. We examine 50 records for customers with phone numbers that should use the current area code of 345. Of these 50 records, we find 10 that still use an older area code of 567. This is an example of:
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inconsistent data.
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A data warehouse database differs from an operational database because:
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data warehouse data are often stored in a dimensional database.
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The term drill down means the user wants to:
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get more details.
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Market basket analysis is:
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a data mining technique.
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We have done an RFM analysis on our customer data. John Smith has a score of 5 1 1." This means that John:"
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hasn't ordered recently, but orders a lot when he orders.
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The reports generated by a reporting system can be classified as:
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Both static and dynamic.
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Data mining techniques are used to find patterns and relationships that can be used to:
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Both classify and predict
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A BI reporting system:
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Both creates meaningful information from disparate data sources and delivers information to users on a timely basis.
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Business Intelligence (BI) systems fall into which of the following categories?
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Both Reporting and Data mining.
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We have obtained access to the company's operational data. In one record, we find that a customer's age has been record as 337". This is an example of:"
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Dirty data.
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A report generated by a reporting system is delivered to the appropriate users via an electronic display customized for each user. This system uses which of the following media?
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Digital dashboard
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Business Intelligence (BI) systems do which of the following?
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Both analyze current and past activities and Predict future events
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A data mart differs from a data warehouse in that:
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All of these (data mart users do not have the data management expertise of data warehouse employees, it has a smaller database, and it deals with a particular component or functional area of the business,
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OLAP stands for:
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Online Analytical Processing
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Which of the following is a reason that operational data are difficult to read?
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All of these (Missing values, Dirty data, and Non-integrated data.)
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RFM scores commonly range from ___, with ___ being the high" or "most desirable" score."
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1 to 5, 1
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Which of the following is a common unsupervised data mining technique?
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Cluster analysis
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Data mining applications are used to accomplish which of the following tasks?
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All of these (Perform what-if analysis, make predictions, and facilitate decision making).
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Which of the following is a common supervised data mining technique?
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Regression analysis
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Business Intelligence (BI) reporting systems can do which of the following operations?
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Both filter data and group data.
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One Business Intelligence (BI) reporting system that uses extensions to SQL is:
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OLAP.
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