STAT 627 UCLA Variable Selection and Shrinkage Questions

Question Description

4 questions, the last 2 questions needs use R studio.

see the file for all questions,

(Chap. 6, # 2, p.259) Consider three methods of fitting a linear regression model – (a)lasso, (b) ridge regression, and (c) fitting nonlinear trends. For each method, choose theright answer, comparing it with the least squares regression:i. The method is more flexible and hence will give improved prediction accuracy when itsincrease in bias is less than its decrease in variance.ii. The method is more flexible and hence will give improved prediction accuracy when itsincrease in variance is less than its decrease in bias.iii. The method is less flexible and hence will give improved prediction accuracy when itsincrease in bias is less than its decrease in variance.iv. The method is less flexible and hence will give improved prediction accuracy when itsincrease in variance is less than its decrease in bias.

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