Question: (a) What is the bias variance decomposition? Explain what is bias and what is variance, respectively. (5 points) (b) Explain why the lasso has the

(a) What is the bias variance decomposition? Explain what is bias and what is variance, respectively. (5 points) (b) Explain why the lasso has the variable selection function while ridge doesn't.| (5 points) (c) In a best subset selection problem of p variables, how many subset models do we need to enumerate to find the best subset model? (5 points)

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