15 - Re-expressing Data

How can we proceed with regression analysis when the scatter is not ‘straight enough’?

Practice

Chapter 10 # 1,5,7,17

Vocabulary

re-expression, ladder of powers

Study Questions

1. What is the purpose of re-expressing data?
2. How does the residual plot help you decide whether a linear model is appropriate?
3. How is the ladder of powers used to straighten the relationship?

Resources

1. Slide Deck: 15-Re-expressing-Data.pdf
2. Slide Deck: 15-Re-expression-Two-Questions.pdf