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How does MARS ensure that a model will perform as claimed on future data?

Almost all modeling technologies can track training data accurately. MARS protects users from misleading results through its two-stage modeling process. MARS overfits its model initially but then prunes away all components that would not hold up with new data. MARS provides assessments through use of one of two built-in testing regimens: cross validation or reference to independent test data. Using these tests, MARS determines the degree of accuracy that can be expected from the best predictive model.

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Tags: Frequently Asked Questions, FAQs, Predictive Modeling, MARS, SPM

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