Which method is commonly used to select the right number of clusters? 1 pointThe elbow method. The ROC curve. The perfect Square MethodThe Sum of Square Method
Question
Solution
The method commonly used to select the right number of clusters is the Elbow Method.
Here are the steps to use the Elbow Method:
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Compute clustering algorithm (e.g., k-means) for different values of k. For instance, by varying k from 1 to 10 clusters.
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For each k, calculate the total within-cluster sum of square (wss).
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Plot the curve of wss according to the number of clusters k.
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The location of a bend (knee) in the plot is generally considered as an indicator of the appropriate number of clusters.
The ROC curve, Perfect Square Method, and Sum of Square Method are not typically used for determining the number of clusters.
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