Clustering Techniques: K-means vs. Hierarchical Clustering
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Questions and Answers

What method can be used to choose the value of K in K-means clustering?

  • Elbow Method (correct)
  • Hierarchical Method
  • Silhouette Method
  • Density-Based Clustering
  • In K-means clustering, what is the role of the value K?

  • Data point threshold
  • Number of clusters (correct)
  • Dimensionality of the data
  • Algorithm convergence rate
  • Which distance metric is commonly used in calculating distances between data points in K-means clustering?

  • Chebyshev distance
  • Euclidean distance (correct)
  • Minkowski distance
  • Manhattan distance
  • What is the purpose of a dendrogram in hierarchical clustering?

    <p>Illustrate the hierarchy of clusters</p> Signup and view all the answers

    Which cluster evaluation method compares the average distance between clusters with the average distance within clusters?

    <p>Davies–Bouldin Index</p> Signup and view all the answers

    What is the result of applying the Elbow Method to determine the optimal number of clusters?

    <p>Identifying a point where the rate of decrease sharply changes</p> Signup and view all the answers

    What is the main goal of clustering?

    <p>To divide data points into groups with similar characteristics</p> Signup and view all the answers

    In which type of clustering does each data point belong to a single cluster?

    <p>K-means clustering</p> Signup and view all the answers

    What is the initial step in the K-means clustering algorithm?

    <p>Selecting the number of clusters (K)</p> Signup and view all the answers

    Which technique involves the use of probability or likelihood to assign data points to clusters?

    <p>Soft clustering</p> Signup and view all the answers

    What happens in the K-means algorithm if a data point is reassigned to a different cluster?

    <p>A new centroid is placed in the original cluster</p> Signup and view all the answers

    Which step indicates the termination of the K-means clustering algorithm?

    <p>Repeating the reassignment until convergence</p> Signup and view all the answers

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