Which mathematical analysis technique revolutionized retail by uncovering unexpected relationships between purchased items, leading to the famous 'beer and diapers' merchandising insight?

In the world of retail, sophisticated mathematical models have transformed how businesses analyze customer behavior and optimize product placement. One particular statistical technique revolutionized retail analytics by enabling stores to identify unexpected product affinities and optimize store layouts accordingly. This mathematical innovation has saved retailers billions and changed how products are positioned on shelves worldwide. Do you know which groundbreaking analytical method changed the retail landscape forever?

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Market Basket Analysis
Monte Carlo Simulation
Principal Component Analysis
Markov Chain Modeling