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Assume you have a training dataset consisting of 1 million observations. Suppose fitting the model with p features on this data takes 10 -5 p

Assume you have a training dataset consisting of 1 million observations.

Suppose fitting the model with p features on this data takes 10-5p seconds.

Suppose you want to choose the best p by searching over 20 features. How long will it take to run LOOCV for this selection task?

A About 3.3 hours
B About 3.3 days
C About 3.3 weeks
D About 3.3 years

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