Which mathematical modeling approach led to a 40% improvement in sales forecasting accuracy for major retailers between 2018-2020?

Retail analytics has been revolutionized by advanced mathematical modeling in recent years. One particular innovation has dramatically improved inventory management and sales forecasting across the industry. Test your knowledge about this intersection of mathematics and retail technology that has changed how major retailers operate.

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Bayesian Hierarchical Models with seasonal decomposition
Simple linear regression with monthly aggregation
Neural networks without time-series components
Monte Carlo simulations with fixed parameters