15.5. Chapter Exercise#
Apply the key ideas from this chapter in the connected task below. Work in your own notebook or local project. Keep your implementation, reasoning, and verification results together.
15.5.1. Interpret clusters cautiously#
Use the chapter’s real wholesale-customer data and justify the selected variables, transformation, and scaling before clustering.
Fit K-Means reproducibly for several values of k, then compare inertia, silhouette evidence, and cluster sizes.
Describe cluster profiles in original business terms and explain limitations, instability, and why clusters are not known truth. Treat the PCA reading as an optional comparison rather than a required step.
Return to the chapter lessons as needed: Clustering Concepts, K-Means Workflow, Interpreting Clusters.