Discussion
Which of the following is an unsupervised data mining technique?
Answer: A
Correct answer: Cluster analysis only
Unsupervised techniques are applied without a hypothesis or a target variable: the analyst looks for patterns and then constructs an explanation for whatever emerges. Cluster analysis is the type example. Regression is supervised, since a model is specified in advance and fitted, and RFM is a reporting technique rather than data mining at all.
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