Question: What is the main difference between agglomerative and divisive hierarchical clustering?

Options:

1. Agglomerative starts with individual points, while divisive starts with one cluster
2. Agglomerative is faster than divisive
3. Divisive clustering is more commonly used than agglomerative
4. There is no difference; they are the same

Correct Answer: Agglomerative starts with individual points, while divisive starts with one cluster

Solution:

Agglomerative clustering begins with individual data points and merges them into clusters, while divisive clustering starts with one cluster and splits it into smaller clusters.