Which mathematical technique is specifically used in retail analytics to identify groups of customers with similar purchasing behaviors for targeted marketing campaigns?

In today's data-driven retail environment, mathematical models and statistical analysis form the backbone of strategic decision-making. Advanced retail analytics employs sophisticated mathematical techniques to transform raw sales data into actionable insights. This poll tests your knowledge of how mathematics is specifically applied in retail data analytics to optimize business operations and enhance customer experience.

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Cluster analysis (k-means, hierarchical clustering)
Fourier transformation
Differential equations
Euclidean geometry