Explanation:
With the elbow method for selecting the best number of clusters, the goal is to select the number of clusters where the decrease in inertia begins to slow.
(Book 2, Module 25.2, LO 25.f)
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Question 78
A data controller determines the optimal number of clusters for a new data set. She decides to apply the elbow method, which incorporates an inertia measure. Which of the following statements is correct? The selected number of clusters should be the point where:
A
inertia is at its highest.
B
the decrease in inertia slows.
C
the decrease in inertia speeds up.
D
the increase in inertia slows.
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