INTRODUCTION TO STATISTICAL LEARNING
INTRODUCTION TO STATISTICAL LEARNING
21st Edition
ISBN: 9781071614174
Author: James
Publisher: SPRINGER
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Chapter 3, Problem 3E

a.

Explanation of Solution

Predictors

  • The least square line is given by

    y=50+20GPA+0.07IQ+35Gender+0.01GPA×IQ-10GPA×Gender

  • For males, y=50+20GPA+0.07IQ+0.01GPA×IQ
  • And for females, y=85+10GPA+0.07IQ+0

b.

Explanation of Solution

Salary prediction

  • It suffices to plug in the given values in the least square line for females and obtains

    y=85<

c.

Explanation of Solution

Coefficient

  • It is false.
  • This is because to verify if the GPA/IQ has an impact on the quality of the model we need to test ...

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