How many customer groups should you specify?
Refer to the exhibit.
You are using K-means clustering to classify customer behavior for a large retailer. You need to determine the optimum number of customer groups. You plot the within-sum-of- squares (wss) data as shown in the exhibit.
How many customer groups should you specify?
A . 2
B . 3
C . 4
D . 8
Answer: C
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