Which mathematical concept revolutionized online retail recommendation systems, leading to Amazon's reported 35% increase in sales?

The intersection of mathematics and retail marketing has led to revolutionary approaches in consumer engagement. Advanced algorithms and statistical models now drive personalized shopping experiences, targeted advertisements, and predictive purchasing patterns. This poll tests your knowledge about how mathematical principles have transformed retail innovation and consumer psychology in the digital age.

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Collaborative filtering algorithms
Euclidean distance formulas
Fibonacci sequence optimization
Bayesian probability networks