Question: (d) Based on the cross-validated root mean square error, which of the two models is better? (e) For model 2, which is larger; the residual

(d) Based on the cross-validated root mean square error, which of the two models is better? (e) For model 2, which is larger; the residual SD or the cross-validated root mean square error? (f) The conclusion from (e) is often true. Can you explain intuitively why this might be the case
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