An Introduction to Statistical Learning: with Applications in R (Springer Texts in Statistics)
An Introduction to Statistical Learning: with Applications in R (Springer Texts in Statistics)
13th Edition
ISBN: 9781461471370
Author: Gareth James
Publisher: SPRINGER NATURE CUSTOMER SERVICE
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Chapter 2, Problem 1E

a.

Explanation of Solution

Flexible or inflexible method

  • When the sample size n is large and number of predictors p is small, then the method is inflexible.
  • Flexible methods work better when a large number of predictors need to be predicted.
  • An inflexible method will work better in the case of small number of predictors.

b.

Explanation of Solution

Flexible or inflexible method

  • When the number of predictors is large, then the method is flexible.
  • Flexible methods work better when a large number of predictors need to be predicted.
  • An inflexible method will work better in the case of small number of predictors.

c.

Explanation of Solution

Flexible or inflexible method

  • When the relationship between predictors and response is non-linear then the method is flexible.
  • Flexible methods are good at fitting non-linear models.

d.

Explanation of Solution

Flexible or inflexible method

  • When the variance of error terms is extremely high, then the method is inflexible.
  • Choosing a flexible model in the case is over fitting.
  • A flexible method will end up fitting the noise.

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Chapter 2 Solutions

An Introduction to Statistical Learning: with Applications in R (Springer Texts in Statistics)

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