Question 1

A measure of the strength of the relationship between the variables in a linear regression equation that indicates the percentage of the variation in the dependent variable that isa result of the behavior of the independent variable is the

Accepted Answer

The coefficient of determination, also known as R-squared, measures the proportion of the total variation in the dependent variable that can be explained by the independent variable(s). It is a better measure of the strength of the relationship in a linear regression than just the correlation coefficient (A) or the regression coefficient (D), which only describe the direction and magnitude of the relationship, respectively. The linear coefficient (B) is not a commonly used term in regression analysis.

Question 2

A data mining tool that searches for relationships between variables across a variety of variations is

Accepted Answer

Association rule learning is a data mining technique that searches for relationships between variables across a variety of variations. It is used to identify patterns in data and create association rules that link one variable to another. Classification is used to classify data into categories or groups, while clustering is used to group data based on similarities. Summarization is used to provide a summary of the data.

Question 3

A data mining tool that uses software packages to identify groups in the data that naturally fall together is

Accepted Answer

Clustering is the data mining technique that identifies groups in the data that are similar to each other and naturally falls together. Association rule learning finds relationships and patterns among variables, classification predicts class labels for new data, and summarization provides a concise representation of a large amount of data.

Question 4

A company's repository for its own current and historical data ,including information from its own operations is typically called a

Accepted Answer

A data warehouse is a central repository of information that can come from a variety of sources, including a company's own operations. It is designed to support business analysis activities such as data mining, reporting, and querying. A database is a structured collection of data that is usually specific to a single application or system. A data repository is a broad term that can refer to any kind of data storage, while a data mine refers to the process of analyzing data in order to discover novel patterns or insights.

Question 5

Data mining tools that might adopt traditional forecasting methods to forecast a variable value like demand from the available data is referred to as

Accepted Answer

The term "traditional forecasting methods" suggests that the question is referring to predictive data mining tools. Therefore, the best choice would be D, which is "predictive." Classification, association learning, and clustering are all data mining techniques that may not necessarily rely on traditional forecasting methods.

Quiz 17: Forecasting

A measure of the strength of the relationship between the variables in a linear regression equation that indicates the percentage of the variation in the dependent variable that isa result of the behavior of the independent variable is the

A data mining tool that searches for relationships between variables across a variety of variations is

A data mining tool that uses software packages to identify groups in the data that naturally fall together is

A company's repository for its own current and historical data ,including information from its own operations is typically called a

Data mining tools that might adopt traditional forecasting methods to forecast a variable value like demand from the available data is referred to as