12 Questions
Which of the following is a key concept in clustering?
Node Purity
What is the main purpose of a star schema in the context of a data warehouse?
Conceptual model of data warehouse
What type of clustering involves merging similar data points into a single cluster?
Agglomerative clustering
What is a subset of a data warehouse that is focused on a specific area within an organization?
Data Mart
Which technique involves learning by observing patterns in data examples?
Learning by example
In the context of clustering, what is used to measure the compactness of clusters?
Sum of Squared Error
What is the term for predicting test examples using irrelevant training records due to an insufficient number of training records?
Underfitting
Is it always true that an increase in accuracy is associated with a decrease in cost?
No
What is the key concept of Clustering in less than three words?
Unsupervised learning
Which evaluation/validation method is commonly used in Data Mining?
Cross-validation
How many If….Then rules can be generated from a Decision Tree?
$2^n$ where $n$ is the number of decision nodes
In a Decision Tree, how many classes are represented?
$2^n$ where $n$ is the number of decision nodes
Test your knowledge of data warehousing and clustering concepts with this matching quiz. Match the correct term to its definition and score 10 points.
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