Data Warehousing and Clustering Matching Quiz
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Questions and Answers

Which of the following is a key concept in clustering?

  • Partitioning clustering
  • Internal Index
  • Node Purity (correct)
  • Learning by example
  • What is the main purpose of a star schema in the context of a data warehouse?

  • Decision tree
  • Sum of Squared Error
  • OLAP operations
  • Conceptual model of data warehouse (correct)
  • What type of clustering involves merging similar data points into a single cluster?

  • Agglomerative clustering (correct)
  • Distance calculation
  • Classification
  • K-means clustering
  • What is a subset of a data warehouse that is focused on a specific area within an organization?

    <p>Data Mart</p> Signup and view all the answers

    Which technique involves learning by observing patterns in data examples?

    <p>Learning by example</p> Signup and view all the answers

    In the context of clustering, what is used to measure the compactness of clusters?

    <p>Sum of Squared Error</p> Signup and view all the answers

    What is the term for predicting test examples using irrelevant training records due to an insufficient number of training records?

    <p>Underfitting</p> Signup and view all the answers

    Is it always true that an increase in accuracy is associated with a decrease in cost?

    <p>No</p> Signup and view all the answers

    What is the key concept of Clustering in less than three words?

    <p>Unsupervised learning</p> Signup and view all the answers

    Which evaluation/validation method is commonly used in Data Mining?

    <p>Cross-validation</p> Signup and view all the answers

    How many If….Then rules can be generated from a Decision Tree?

    <p>$2^n$ where $n$ is the number of decision nodes</p> Signup and view all the answers

    In a Decision Tree, how many classes are represented?

    <p>$2^n$ where $n$ is the number of decision nodes</p> Signup and view all the answers

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