Mis Final chapter 9

Which of the following statements is true of a data warehouse?

A data warehouse is larger than a data mart.

Which of the following statements is true of unsupervised data mining?

Analysts create hypotheses only after performing an analysis.

Which of the following statements is true of BigData?

BigData refers to data sets that are at least a petabyte in size.

process operational and other data in organizations to analyze past performance and make predictions.

Business intelligence systems

Which of the following statements is true of business intelligence (BI) systems?

Business intelligence systems analyze an organization's past performance to make predictions

is an unsupervised data mining technique in which statistical techniques identify groups of entities that have similar characteristics.

Cluster analysis

is the process of obtaining, cleaning, organizing, relating, and cataloging source data.

Data acquisition

is the application of statistical techniques to find patterns and relationships among data for classification and prediction.

Data mining

techniques emerged from the combined discipline of statistics, mathematics, artificial intelligence, and machine-learning.

Data mining

reports are business intelligence documents that are updated at the time they are requested.

Dynamic

are reports produced when something out of predefined bounds occurs.

Exception reports

refers to the level of detail represented by data.

Granularity

Which of the following statements is true of data with granularity?

Granularity refers to the level of detail represented by the data.

is an open-source program supported by the Apache Foundation that manages thousands of computers and implements MapReduce.

Hadoop

Which of the following statements is true of Hadoop?

Hadoop is an open-source program that implements MapReduce

In the ________ phase, a BigData collection is broken into pieces and hundreds or thousands of independent processors search these pieces for something of interest.

Map

Which of the following statements is true of business intelligence (BI) publishing alternatives?

Publishing dynamic BI is more difficult than publishing static content.

requires users to request business intelligence results.

Pull publishing

is the process of delivering business intelligence to users without any request from the users.

Push publishing

The results generated in the Map phase are combined in the ________ phase

Reduce

is used to measure the impact of a set of variables on another variable during data mining.

Regression analysis

is the process of sorting, grouping, summing, filtering, and formatting structured data.

Reporting analysis

are business intelligence documents that are fixed at the time of creation and do not change.

Static reports

are user requests for particular business intelligence results on a particular schedule or in response to particular events.

Subscriptions

A ________ is a data collection that addresses the needs of a particular department or functional area of a business.

data mart

Which of the following is a fundamental category of business intelligence (BI) analysis?

data mining

A ________ is a facility for managing an organization's business intelligence data.

data warehouse

The purpose of a ________ is 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

Users in a data mart obtain data that pertain to a particular business function from a

data warehouse

Problematic data are referred to as

dirty data

Which of the following problems is particularly common for data that have been gathered over time?

lack of consistency

The ________ of business intelligence servers maintains metadata about the authorized allocation of business intelligence results to users.

management function

The source, format, assumptions, constraints, and other facts concerning certain data are called _

metadata

Which of the following activities in the business intelligence process involves delivering business intelligence to the knowledge workers who need it?

publish results

The goal of ________, a type of business intelligence analysis, is to create information about past performance.

reporting

The use of an organization's operational data as the source data for a BI system is not usually recommended because it

requires considerable processing and can drastically reduce system performance

Which of the following refers to data in the form of rows and columns?

structured data

In the case of ________, data miners develop models prior to conducting analyses and then apply statistical techniques to data to estimate parameters of the models.

supervised data mining

Regression analysis is used in

supervised data mining

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