Which mathematical technique revolutionized retail product recommendation systems and is now a standard feature in most e-commerce platforms?

In today's data-driven retail environment, mathematical models and algorithms are transforming how businesses understand customer behavior and optimize operations. From predicting purchasing patterns to optimizing inventory, mathematics plays a crucial role in retail technology innovation. This poll tests your knowledge about how mathematical concepts are applied in modern retail analytics platforms.

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Collaborative filtering using matrix factorization
Simple regression analysis
Descriptive statistics and percentile ranking
Basic arithmetic mean calculations